All Calculators

Calculate your monthly mortgage payment, total interest, and view a full amortization schedule. Compare different loan terms and interest rates.

Calculate your monthly car payment, total interest, and view a full repayment schedule. Includes sales tax and trade-in value.

See how long it takes to pay off your credit card and how much interest you'll pay. Compare different payment strategies.

Calculate monthly payments and total interest for a personal loan. Compare different rates and terms to find the best deal.

Calculate your debt-to-income (DTI) ratio to understand your borrowing capacity. Lenders use DTI to determine mortgage and loan eligibility.

Calculate your student loan monthly payment, total interest, and payoff timeline. See how extra payments accelerate payoff.

Compare debt snowball vs avalanche payoff strategies. See which method saves more money and how long payoff takes.

Compare your current loan to a refinanced loan. See monthly savings, total interest savings, and break-even point.

Calculate how long it takes to pay off multiple debts using the avalanche method (paying highest interest first). Compare total interest paid and time to freedom.

Calculate your loan-to-value (LTV) ratio for mortgages and loans. Understand your equity and risk level.

Compare two loans side-by-side. See monthly payments, total cost, and interest differences to choose the best option.

Calculate if debt consolidation saves money. Compare current debt payments with a consolidated loan to see monthly savings and total cost.

Calculate loan amortization schedule. See principal and interest breakdown for any payment, remaining balance, and total interest.

Calculate how long it will take to pay off a loan with fixed monthly payments. See total interest and payoff schedule.

Calculate interest savings from paying off a loan early. Compare different loan terms and see how much you save.

Snowball vs Avalanche, consolidation analysis, debt-free date

Payment, affordability, rent vs buy, refinance, amortization

Calculate the Annual Percentage Rate (APR) for a loan including all fees and costs. Compare the true cost of different loan offers.

Calculate FHA loan payments including mortgage insurance premium (MIP). See upfront and annual MIP costs for FHA-backed mortgages.

Calculate VA loan payments with funding fee. VA loans require no PMI and offer competitive rates for eligible veterans and service members.

Calculate your Home Equity Line of Credit (HELOC) available credit and payments. See how much you can borrow against your home equity.

See how your money grows over time with compound interest. Visualize the power of compounding with monthly contributions.

Calculate the total and annualized return on your investment. Compare performance across different time periods.

Quickly estimate how long it takes to double your money. The Rule of 72 gives a simple approximation based on your interest rate.

See how much you'll have at retirement based on your savings rate and investment returns. Estimate your monthly retirement income.

See how regular monthly investments grow over time with dollar-cost averaging. Compare to lump sum investing.

See how reinvesting dividends compounds your portfolio growth over time. Includes dividend growth rate and price appreciation.

Project your 401(k) balance at retirement with employer matching. See how contributions, employer match, and compound growth build your retirement savings over time.

Project your Roth IRA balance at retirement with tax-free growth. See how annual contributions and compound interest build your nest egg — all tax-free at withdrawal.

Calculate the future value and present value of an annuity. Plan your retirement income or investment returns.

Calculate retirement income from savings using the 4% rule or custom withdrawal rate. Plan your retirement withdrawals.

Calculate when you can retire based on savings, contributions, and retirement goals. See retirement age and years needed.

Compound growth, DCA vs lump sum, dividends, tax impact

401(k), IRA, Roth, Social Security, FIRE, income gap analysis

Calculate Internal Rate of Return (IRR) for an investment with multiple cash flows. Essential for comparing investment opportunities and project analysis.

Calculate the present value of a future sum of money. Understand how much future money is worth today using time value of money principles.

Calculate the future value of a lump sum investment with compound interest. See how your money grows over time with different compounding frequencies.

Calculate your estimated pension benefits based on years of service, salary, and pension multiplier. Plan your retirement income.

Calculate your Required Minimum Distribution from retirement accounts. Uses IRS Uniform Lifetime Table to determine annual withdrawal requirements.

Calculate Certificate of Deposit (CD) returns. Compare different terms to find the best CD for your savings goals.

Calculate simple interest on a principal amount. Compare with compound interest to understand the difference.

Calculate bond yields including yield to maturity (YTM) and current yield. Analyze bond investments and compare returns.

Calculate compound interest with daily compounding. See how your investment grows with daily interest calculations.

Quickly calculate the tip amount and split the bill among any number of people.

Split the bill and tip evenly among multiple people. Calculate how much each person should pay including tip.

Find out how much you need to save each month to reach your savings goal. See how interest helps you get there faster.

Calculate your net worth by listing your assets and liabilities. Track your financial progress over time.

Calculate how much you need in your emergency fund and how long it will take to build one. Experts recommend 3-6 months of expenses.

See how inflation erodes purchasing power over time. Calculate the future cost of goods and what your money will really be worth.

Estimate your take-home pay after federal tax, state tax, FICA, 401(k), and health insurance deductions.

Calculate your Financial Independence, Retire Early (FIRE) number, timeline, and monthly passive income.

Compare cost of living between cities using index numbers. See what salary you'd need to maintain your lifestyle.

Apply the 50/30/20 budgeting rule to your monthly income. Split your take-home pay into needs, wants, and savings for a balanced financial plan.

Calculate how much your savings will grow with compound interest and regular deposits. See future value and total interest earned.

Convert between currencies using current exchange rates. Useful for international transactions and travel planning.

All-in-one budget planner with cash flow, net worth, emergency fund, and savings goal tracking.

Estimate your federal income tax, FICA taxes, effective tax rate, and take-home pay based on your filing status and deductions.

Calculate sales tax on any purchase. Find the total price including tax, or reverse-calculate the pre-tax price from a total.

Estimate your capital gains tax on investments, real estate, or other assets. Covers both short-term and long-term rates based on your income and filing status.

Calculate your self-employment tax including Social Security, Medicare, and quarterly estimated payments.

Find your federal tax bracket, marginal rate, and effective tax rate. See how much you owe at each bracket level.

Estimate your annual and monthly property tax based on home value, assessment rate, tax rate, and exemptions. Understand your effective property tax rate.

Estimate your federal income tax withholding based on salary, filing status, and allowances. See your per-paycheck, monthly, and annual withholding amounts.

Calculate quarterly estimated tax payments for freelancers and self-employed individuals. Includes both income tax and self-employment tax (15.3%).

Estimate your tax refund or amount owed. Calculate based on income, filing status, withholdings, deductions, and credits.

Federal + state taxes, FICA, deductions, take-home pay

Federal & state tax, capital gains, SE tax, refund estimate

Find out how much house you can afford based on your income, debts, and down payment. Uses the 28/36 rule for conservative estimates.

Compare the financial outcomes of renting vs buying a home over time. Accounts for appreciation, investment returns, taxes, and maintenance.

Estimate your total closing costs when buying a home. Includes lender fees, title insurance, escrow, prepaid items, and government fees.

Calculate how much you need for a down payment and how long it will take to save. See how different down payment percentages affect your loan.

Calculate gross yield, net yield, cap rate, and monthly cash flow for rental property investments.

Estimate your home's current value based on purchase price, years owned, annual appreciation rate, and improvements made.

Calculate the return on investment for home renovation projects. Compare renovation cost to value added and see how much you'll recoup.

Calculate the true cost of HOA fees over time including annual increases and special assessments.

Calculate capitalization rate (cap rate) for real estate investments. See NOI, property value, and gross rent multiplier.

Comprehensive real estate investment calculator with cash flow analysis, cap rate calculation, renovation ROI, stock comparison, and 1031 exchange planning.

Calculate the square footage of a rectangular area. Convert between square feet, yards, and meters. Estimate total cost based on price per square foot.

Calculate how much concrete you need in cubic yards, bags, and cost for slabs, footings, and walls.

Calculate how many gallons of paint you need for a room. Accounts for doors, windows, and multiple coats.

Calculate how much paint you need for your room. Estimate gallons and quarts based on room dimensions and coverage.

Calculate how many tiles you need for your floor or wall project. Account for waste and see total tiles needed.

Calculate concrete volume needed for your project. See cubic yards, cubic meters, and number of bags needed.

Calculate how much flooring you need for a room. Accounts for waste, calculates boxes needed, and estimates cost.

Calculate board feet for lumber purchases. Enter dimensions and quantity to get total board footage and estimated cost.

Calculate how many drywall sheets, joint tape, compound, and screws you need for your project.

Calculate how much gravel, mulch, sand, or topsoil you need in cubic yards, tons, and bags.

Calculate roof pitch in degrees and percentage from rise and run measurements. Determine roof type and rafter length.

Estimate the total cost of building a deck including materials, railing, stairs, and labor based on size and material type.

Estimate fence materials and costs including posts, panels, rails, and gates for wood, vinyl, chain link, or aluminum fencing.

Calculate concrete needed for a slab. Estimate volume, bags, and cost for your concrete project.

Calculate insulation costs, energy savings, and payback period. Determine the best insulation for your home.

Calculate roofing materials needed for your roof. Estimate shingles, squares, and costs based on roof dimensions and pitch.

Calculate wallpaper needed for a wall. Estimate rolls, strips, and account for pattern repeats.

Comprehensive home improvement calculator for paint, flooring, tile, drywall, concrete, roofing, deck, and fence projects. Get material quantities, labor estimates, and shopping lists.

Calculate your Body Mass Index (BMI) to assess your weight category. Supports both imperial and metric units.

Calculate your Total Daily Energy Expenditure (TDEE) and daily calorie needs based on your age, weight, height, and activity level.

Estimate your body fat percentage using the US Navy method. Determine your body composition category and fat vs lean mass.

Calculate your ideal body weight using four scientific formulas. See your healthy weight range based on BMI and height.

Calculate how much water you should drink daily based on your weight, activity level, and climate.

Estimate your one-rep max for any lift based on weight and reps. Get a training percentage chart for programming your workouts.

Calculate your personalized heart rate training zones using the Karvonen method. Optimize your cardio workouts for fat burn, endurance, or performance.

Calculate your estimated due date, current gestational week, trimester, and key pregnancy milestones.

Calculate your daily protein, carb, and fat targets based on your body, activity level, and fitness goal.

Estimate your blood alcohol content based on weight, gender, drinks consumed, and time elapsed. Understand impairment levels and time to sobriety.

Estimate your ovulation date and fertile window based on cycle length and last menstrual period. Plan or prevent pregnancy with cycle tracking.

Calculate your body surface area (BSA) using multiple medical formulas. Used for medication dosing and medical calculations.

Calculate calories burned during exercise based on weight, duration, activity type (MET), and heart rate. Track your workout intensity.

Calculate your lean body mass (LBM) and body fat mass. See ideal LBM ranges based on gender and weight.

Calculate your Resting Metabolic Rate using the Mifflin-St Jeor equation. Estimate daily calorie needs at different activity levels.

Calculate your waist-to-hip ratio and assess health risks. A useful indicator of body fat distribution.

Calculate your sleep debt based on ideal vs actual sleep hours. Track your sleep deficit over time.

Calculate your target heart rate zones for different exercise intensities. Optimize your workout intensity.

Estimate your VO2 max (maximum oxygen consumption) based on heart rate. Assess cardiovascular fitness.

BMI, body fat, TDEE, macros, and ideal weight in one tool

Scale any recipe up or down. Enter your original serving size and desired servings to get adjusted ingredient amounts.

Convert between cooking measurements — teaspoons, tablespoons, cups, ounces, pints, quarts, gallons, milliliters, and liters.

Track your daily caffeine intake from coffee, tea, soda, and energy drinks. Compare against FDA recommendations.

Get the right ingredient ratios for bread, cake, pizza, cookies, and pastry based on baker's percentages.

Calculate how much meal prepping saves vs eating out. See cost per serving, weekly savings, and annual savings.

Calculate Alcohol By Volume (ABV) from original and final gravity readings. Essential for home brewers and winemakers.

Calculate total calories from macronutrients. Enter protein, carbs, fat, and alcohol grams to see calorie breakdown and macro percentages.

Calculate the number of servings, total calories, and cost per serving from package information.

Scale recipes up or down. Convert ingredient amounts based on desired number of servings. Perfect for meal prep and parties.

Calculate cooking time for meat and other foods based on weight and cooking method. Plan your meal preparation.

Calculate sugar content in food and beverages. Convert to teaspoons and see percentage of daily recommended limit.

Scale recipes, convert measurements, and analyze servings and costs all in one place.

Baker's ratios, cooking times, temperature conversions, and pan size scaling for bakers.

Track calories, caffeine, sugar, meal prep savings, and ABV all in one place.

Calculate percentages easily — find a percentage of a number, percentage increase/decrease, and percentage change between two values.

Add, subtract, multiply, or divide fractions. Get simplified results, mixed numbers, and decimal equivalents.

Calculate the mean, median, standard deviation, and variance for a set of numbers. Supports both population and sample calculations.

Calculate probability of single events, combined events (AND/OR), permutations, and combinations.

Calculate your semester GPA and cumulative GPA. Enter course grades and credit hours for an instant result.

Calculate mean, median, mode, range, geometric mean, and harmonic mean of a set of numbers.

Solve quadratic equations (ax² + bx + c = 0). Find roots, discriminant, vertex, and axis of symmetry with a visual graph.

Calculate logarithms with any base. Get log base 10, natural log (ln), log base 2, and custom base logarithms instantly.

Convert numbers to scientific notation and engineering notation. Control significant figures and see coefficient and exponent.

Perform matrix operations: addition, subtraction, multiplication, determinant, and transpose for 2x2 matrices.

Advanced scientific calculator with trigonometric functions, logarithms, powers, roots, factorial, and more.

Calculate the percentage change between two values. See absolute change and percentage increase or decrease.

Calculate compound growth rate, final value, or initial value. Useful for investments, population growth, and business metrics.

Calculate factorial (n!) and double factorial (n!!). Useful for permutations, combinations, and mathematical calculations.

Calculate permutations and combinations. Essential for probability, statistics, and counting problems.

Calculate linear regression line, slope, intercept, and R-squared. Find the best-fit line for your data points.

Convert numbers to standard form (scientific notation). Express large or small numbers in a×10ⁿ format.

Calculate percentage increase from original to new value. Find the percent change between two numbers.

Calculate percentage decrease from original to new value. Find the percent reduction between two numbers.

Plot functions, compute calculus operations, and explore advanced math with interactive graphs.

Multi-domain scientific calculator with expression input and multiple modes

Solve equations of all types: linear, quadratic, cubic, polynomial, systems of equations, exponential, logarithmic, and absolute value. Detailed step-by-step solutions with explanations included.

Calculate voltage, current, resistance, or power using Ohm's Law (V = I × R). Enter any two values to find the others.

Calculate voltage drop in electrical wiring based on wire gauge, length, current, and material. Ensure your circuits meet NEC recommendations.

Calculate force, mass, or acceleration using Newton's Second Law (F = ma). Includes unit conversions to pounds-force and dynes.

Calculate density, mass, or volume using the formula ρ = m/V. Includes a reference table of common material densities.

Calculate molar mass, convert between grams and moles, and find the number of molecules for elements and common compounds.

Convert between wavelength and frequency. Calculate photon energy and identify the electromagnetic spectrum band.

Decode resistor color bands to find resistance value, tolerance range, and minimum/maximum resistance. Includes color code reference table.

Calculate pH, pOH, hydrogen ion concentration, and hydroxide concentration. Determine if a solution is acidic, neutral, or basic.

Solve kinematics problems using equations of motion. Calculate velocity, acceleration, time, or distance from the other known values.

Balance chemical equations and calculate stoichiometry. Find limiting reactants and product yields.

Calculate kinetic energy from mass and velocity. Use the formula KE = ½mv².

Calculate gravitational potential energy from mass and height. Use the formula PE = mgh.

Calculate momentum from mass and velocity. Use the formula p = mv.

Calculate power from work and time, or force and velocity. Use formulas P = W/t or P = Fv.

Complete electrical calculator — Ohm's Law, voltage drop, resistor color codes, series/parallel circuits, and capacitor calculations for engineers and hobbyists.

Complete classical mechanics calculator — force, velocity, acceleration, kinetic/potential energy, momentum, power, and projectile motion calculations.

Calculate the area and perimeter of common shapes — rectangle, circle, triangle, trapezoid, and ellipse.

Calculate the volume and surface area of common 3D shapes — cube, box, sphere, cylinder, and cone. Convert between units.

Find the missing side of a right triangle using the Pythagorean theorem. Calculate area, perimeter, and angles.

Calculate the slope, distance, midpoint, and line equation from two points. Visualize rise over run.

Calculate radius, diameter, circumference, area, sector area, and arc length of a circle from any known value.

Calculate area, angles, heights, perimeter, inradius, and circumradius of any triangle from three sides.

Calculate surface area, lateral area, and volume for cubes, spheres, cylinders, cones, and pyramids.

Calculate the perimeter of rectangles, circles (circumference), triangles, and regular polygons with any number of sides.

Convert angles between degrees, radians, and gradians. Find complementary and supplementary angles, plus sine, cosine, and tangent values.

Calculate the distance between two points on a coordinate plane, plus midpoint, slope, and the distance formula breakdown.

Calculate ellipse area, perimeter, and eccentricity from semi-major and semi-minor axes.

Calculate parallelogram area and perimeter from base, height, and side length.

Calculate volume and surface area of cylinders, cones, spheres, and pyramids. Essential for geometry and construction.

Complete 2D geometry calculator for all common shapes — rectangles, squares, circles, triangles, ellipses, parallelograms, rhombuses, trapezoids, and regular polygons. Calculate area, perimeter, angles, and more.

Complete 3D geometry calculator for all common shapes — cubes, boxes, spheres, cylinders, cones, pyramids, prisms, ellipsoids, torus, and capsules. Calculate volume, surface area, and more.

Convert between Fahrenheit, Celsius, and Kelvin temperature scales instantly.

Convert between all length and distance units — inches, feet, yards, miles, millimeters, centimeters, meters, kilometers.

Convert between weight and mass units — ounces, pounds, stone, kilograms, grams, and tons.

Convert between mph, km/h, m/s, knots, and feet per second instantly.

Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes.

Convert between liters, gallons, cups, fluid ounces, tablespoons, teaspoons, cubic meters, and more.

Convert between square feet, square meters, acres, hectares, square miles, and more area units.

Convert between joules, calories, kilowatt-hours, BTU, electron volts, and other energy units.

Convert between PSI, bar, atmospheres, Pascals, mmHg, and other pressure units.

Convert between all common units: length, weight, temperature, volume, area, speed, energy, pressure.

Calculate your exact age in years, months, days, and more. Find out how many days until your next birthday.

Calculate the exact number of days, months, and years between two dates. Also shows weeks, hours, and minutes.

Calculate daily, weekly, monthly, and annual work hours. Estimate pay based on your hourly rate, including overtime.

Calculate the date that is a given number of business days from a start date. Excludes weekends automatically.

Convert between Unix timestamps and human-readable dates. Get the current Unix time or convert any date to a timestamp.

Count down to any date. See remaining days, hours, minutes, weeks, work days, and sleeps until your target date.

Convert times between UTC offsets. See the time difference and handle day wrapping for scheduling across time zones.

Check if a year is a leap year, find the next and previous leap years, and see how many leap years are in the century.

Calculate your exact age in days, weeks, months, years, hours, minutes, and seconds. Perfect for milestones and celebrations.

Calculate your monthly car lease payment, total lease cost, depreciation, and finance charges. Compare lease terms and money factors.

Calculate your fuel economy in MPG, cost per mile, and annual fuel costs. Convert between MPG, L/100km, and km/L.

Estimate how much your car has depreciated and project future values. Understand the true cost of vehicle ownership over time.

Estimate the total cost of a road trip including fuel, hotels, meals, and tolls. Split costs between passengers.

Compare the total cost of owning an electric vehicle vs a gas car. Includes fuel, maintenance, and purchase price over time.

Calculate monthly car payments including down payment, trade-in, sales tax, and total interest over the loan term.

Calculate tire dimensions, compare sizes, and check speedometer accuracy when changing tire sizes.

Calculate the cost to charge your electric vehicle at home or at a station. See charging time estimates for Level 1, 2, and DC fast charging.

Calculate fuel cost for a trip based on distance, fuel price, and fuel efficiency (MPG or L/100km). See cost per mile/km.

Estimate your car's current value based on age, mileage, and condition. Calculate depreciation.

Comprehensive vehicle calculator with buy vs lease analysis, total cost of ownership, road trip costs, and EV vs gas comparisons. Make informed car decisions.

Calculate engine horsepower from torque and RPM or estimate HP from quarter mile time and vehicle weight. Convert between HP, kW, and metric horsepower.

Estimate your total trip cost including flights, accommodation, food, transport, and activities. See a breakdown per person and per day.

Track your PTO balance, see how many vacation days you have left, and plan how to use them. Calculate the monetary value of your remaining days.

Convert between major world currencies. See exchange rates and comparison tables for 15+ currencies.

Estimate jet lag severity and recovery time based on timezone changes, travel direction, and flight duration.

Estimate flight duration based on distance, airspeed, and wind conditions. Calculate ground speed and wind impact on travel time.

Calculate the great-circle distance between two coordinates using the Haversine formula. Get distance in miles, kilometers, and nautical miles.

Generate a personalized packing list based on trip duration, number of travelers, climate, and laundry access. Get item counts for everything you need.

Compare the total cost of staying at a hotel versus an Airbnb. Includes all fees, taxes, and per-person costs to help you make the best decision.

Calculate fuel cost for a trip based on distance, fuel efficiency, and fuel price. Plan your travel budget.

Calculate travel time based on distance and average speed. Include breaks and rest stops in your journey planning.

Plan your trip budget: transportation, accommodation, food, activities. Compare road trip vs flight costs.

Calculate profit margin, markup percentage, and gross profit from revenue and cost. Essential for pricing decisions.

Find out how many units you need to sell to break even. Visualize the relationship between revenue, costs, and profit.

Calculate your return on investment (ROI) as a percentage. Compare the profitability of different investments.

Calculate the selling price from cost and markup percentage. See profit margin, markup amount, and gross profit.

Calculate your startup's burn rate and runway. Project how long your cash will last based on revenue, expenses, and growth rates.

Calculate customer lifetime value including discounted cash flow, CLV:CAC ratio, and annual profit per customer.

Compare cost-plus, markup, and market-based pricing strategies. Calculate optimal price, margins, and break-even.

Project revenue growth over time with compound annual growth rate. See your revenue trajectory and total growth potential.

Calculate the true total cost of an employee including salary, benefits, payroll taxes, workers' comp, training, and equipment.

Calculate customer acquisition cost, lifetime value (LTV), and the critical LTV:CAC ratio. Essential for SaaS and subscription businesses.

Calculate the break-even point for your business. Determine how many units you need to sell to cover costs.

Calculate inventory turnover ratio and days to sell. Measure how efficiently your business manages inventory.

Calculate working capital and working capital ratio. Assess your business's short-term financial health.

Calculate gross profit and gross profit margin from revenue and cost of goods sold. Measure business profitability.

Calculate price elasticity of demand. Measure how sensitive demand is to price changes.

Calculate asset turnover ratio. Measure how efficiently a company uses its assets to generate sales.

All-in-one freelance rate, self-employment tax, quarterly payments, and W2 vs 1099 comparison.

Calculate profit margin, markup, discounts, and optimal pricing. Complete pricing analysis for businesses.

Convert your hourly wage to an annual salary, monthly, biweekly, and daily pay. See estimated after-tax income.

Calculate your overtime pay based on hourly rate, hours worked, and overtime multiplier. Includes double-time calculations.

Calculate your ideal freelance hourly rate based on desired salary, expenses, taxes, and billable hours. Ensure you're pricing your services correctly.

Track billable vs non-billable hours and calculate weekly, monthly, and annual revenue. Optimize your billing rate.

Estimate your Social Security benefits at different retirement ages. Compare early, full, and delayed retirement.

Estimate child support payments using the income shares model. This is a rough estimate — actual amounts vary significantly by state and court order.

Estimate Social Security Disability Insurance (SSDI) benefits based on earnings history. Uses simplified PIA bend point calculation.

Estimate potential legal settlement amounts based on damages, liability, case strength, and attorney fees. See net settlement after fees.

Estimate alimony payments based on income, marriage duration, and state guidelines. See monthly and annual alimony amounts.

Estimate severance pay based on years of service and salary. Calculate your severance package.

Calculate payroll taxes including federal, state, Social Security, and Medicare. Estimate take-home pay.

Complete compensation calculator — convert hourly to salary, calculate overtime pay, determine freelance rates, estimate payroll taxes, and project Social Security benefits.

Calculate your grade percentage, letter grade, and GPA from points earned. See how many points you need for the next grade.

Find out what grade you need on your final exam to get your desired course grade. See scenarios for different final exam scores.

Calculate your cumulative college GPA with new semester grades. See how your new grades will impact your overall GPA.

Estimate how long it takes to read a document or book based on word count and reading speed. Also calculates speaking time for presentations.

Calculate how much of your college costs are covered by scholarships and financial aid. See the gap you need to fill.

Calculate how many hours per day/week you should study based on course load, difficulty, and grade goals.

Estimate total student loan debt and monthly payments based on tuition, grants, interest rate, and repayment term.

Calculate the total cost of college including tuition, room and board, books, and personal expenses with inflation adjustment.

Calculate your GPA from course grades and credit hours. Supports up to 4 courses.

Create a study schedule based on total hours needed and days available. Plan your study sessions effectively.

Comprehensive college planning calculator with cost estimates, 529 savings projections, financial aid estimation, and student loan planning. Plan for one or multiple children.

Calculate your estimated due date based on your last menstrual period or conception date. Track your current week and trimester.

Predict your child's adult height using the mid-parent method or current height projection. Based on established pediatric growth formulas.

Calculate the total cost of diapers from birth to potty training. Compare disposable, cloth, and hybrid options.

Estimate the cost of childcare based on type (daycare, nanny, au pair), child age, and hours needed. Compare different options.

Track your baby's weight against WHO growth charts. See their percentile ranking for age and sex.

Calculate an age-appropriate allowance amount with spending, savings, and charity splits.

Project your 529 college savings plan balance. See if you're on track to meet your college savings goal with monthly contributions and compound growth.

Get age-appropriate sleep schedules for babies and toddlers. See recommended bedtime, nap times, and total sleep needs by age.

Calculate baby feeding amounts based on weight and age. See recommended feedings per day and amount per feeding.

Track your baby's developmental milestones. See expected ages for common milestones.

Comprehensive pregnancy and baby calculator with due date tracking, growth percentiles, feeding schedules, sleep guidelines, and first-year cost projections.

Convert your dog's age to human years using the updated veterinary formula. Results vary by dog size — small dogs age differently than large breeds.

Calculate how much to feed your dog based on weight, age, and activity level. Includes daily calorie needs and monthly food costs.

Estimate the total lifetime cost of pet ownership including food, vet care, grooming, insurance, and supplies. Compare dogs and cats.

Estimate monthly pet insurance premiums based on pet type, age, breed, coverage level, and deductible.

Calculate how much to feed your cat daily based on weight, age, activity level, and food type.

Calculate the minimum aquarium size for your fish. Get tank recommendations, filter GPH, and heater wattage based on fish count, size, and type.

Calculate pet medication dosages based on weight, pet type, and medication. Always consult your veterinarian before giving any medication to your pet.

Convert your pet's age to human years using updated formulas. More accurate than the old 'multiply by 7' rule.

Calculate your pet's ideal weight, calorie needs, and weight management goals. Keep your pet healthy.

Pet age, food portions, ideal weight, and medication dosing calculator.

Pet ownership costs, insurance analysis, and aquarium calculator.

Estimate your annual carbon footprint from driving, electricity, heating, and air travel. Compare to US and world averages.

Calculate solar panel savings, payback period, and return on investment. Includes federal tax credits, production estimates, and 25-year projections.

Calculate the electricity cost of any appliance or device. Find out daily, monthly, and yearly energy costs based on wattage and usage.

Estimate your daily, monthly, and annual water usage and cost. Identify which activities use the most water.

Calculate how much you'd save by switching to an electric vehicle, including fuel, maintenance, and CO2 reduction.

Evaluate your home's energy efficiency and find potential savings from upgrades like better windows and insulation.

Calculate the environmental impact of planting trees. See CO2 absorbed, oxygen produced, and the equivalent in cars offset or miles driven.

Calculate the annual carbon emissions and fuel cost from your daily commute. Compare car, hybrid, EV, bus, and bike options.

Calculate the environmental impact of recycling. See how much CO2, energy, and water you save by recycling.

Calculate how much compost you can produce and its environmental impact. Track your composting efforts.

Complete carbon footprint calculator — estimate your total emissions, analyze commute impact, compare EV vs gas vehicles, and calculate carbon offset costs.

Calculate the wind chill temperature using the official NWS formula. Assess frostbite risk based on conditions.

Calculate the heat index (feels-like temperature) based on air temperature and humidity. Assess heat danger level.

Calculate the dew point temperature from air temperature and relative humidity. Includes comfort level assessment and frost risk.

Find your USDA Plant Hardiness Zone based on average annual extreme minimum temperature. Know what plants will thrive in your area.

Calculate roof snow load in PSF based on snow depth, type, and roof pitch. Assess structural risk level.

Calculate sunrise, sunset, and total daylight hours for any location and date. See monthly daylight patterns.

Calculate lawn irrigation needs based on rainfall, lawn size, and target watering. See weekly water deficit, watering time, and cost.

Find estimated last spring frost and first fall frost dates by USDA hardiness zone. Plan your garden planting window with confidence.

Assess UV exposure risk based on UV index, skin type, altitude, and snow cover. Get personalized burn time and SPF recommendations.

Convert wind speed between mph, km/h, m/s, and knots. See Beaufort scale rating and wind description.

Calculate relative humidity from temperature and dew point. Understand comfort levels and weather conditions.

Calculate the 'feels like' temperature considering wind chill and heat index. Understand perceived temperature.

Complete weather comfort calculator — calculate wind chill, heat index, dew point, and feels-like temperature. Assess safety risks and get clothing/hydration recommendations.

Calculate your running pace per mile and per kilometer. Get predicted race times for 5K, 10K, half marathon, and marathon distances.

Calculate cycling speed, distance, or time. Includes pace, calorie burn estimates, and metric conversions.

Calculate cycling power output based on speed, weight, grade, and conditions. Estimate watts and power-to-weight ratio.

Estimate calories burned hiking based on distance, elevation gain, terrain, pack weight, and body weight. Includes water intake recommendations.

Estimate hiking time based on distance and elevation gain using Naismith's Rule. Plan your hiking trips accurately.

Calculate your bowling handicap from your last 3 game scores. Uses the standard basis score and percentage method.

Calculate swimming pace per 100m, SWOLF score, lap times, and predict race times for different distances.

Calculate your golf handicap index and course handicap from recent round scores.

Convert between American, decimal, and fractional odds. Calculate implied probability, potential payout, and profit from your stake.

Calculate running pace, splits, and average speed. Track your performance for any distance.

Convert running pace between kilometers and miles. Convert pace to speed and vice versa.

All-in-one pace, heart rate zones, calories, VO2 max, race predictions, and splits for runners and cyclists.

Check how strong your password could be based on length and character types. See estimated time to crack.

Convert between binary, octal, decimal, and hexadecimal number systems. Includes bit count, byte size, and ASCII character lookup.

Calculate how long it takes to download a file at various internet speeds. Compare download times across different connection speeds.

Convert colors between HEX, RGB, HSL, and CMYK formats. Enter RGB values and get all other representations instantly.

Calculate subnet mask, network address, broadcast address, usable host range, and CIDR notation for any IP address.

Calculate pixels per inch (PPI), dot pitch, aspect ratio, and physical dimensions of any display.

Compare cryptographic hash function properties. See output size, collision resistance, brute force time, and security status for MD5, SHA-1, SHA-256, SHA-512, and bcrypt.

Estimate JSON payload size based on key count, value lengths, nesting depth, and array size. See minified and gzipped estimates.

Test regular expressions against sample text. See matches in real-time, validate patterns, and debug regex issues.

Calculate download and upload times based on file size and connection speed. Estimate transfer times for large files.

Calculate IP subnet information including subnet mask, hosts per subnet, and network configuration.

Convert file sizes between bytes, KB, MB, GB, and TB. Understand file size in different units.

Convert binary, hex, decimal, colors, ASCII, and signed integers.

Password strength analysis, crack time estimation, and hash algorithm comparison.

Subnet calculator, bandwidth estimator, and VLSM network planning.

Download times, file sizes, screen PPI, and data encoding calculations.

Calculate how long it will take to read the Bible at your preferred pace. Track your progress and plan your daily reading schedule.

Plan your daily prayer schedule and calculate your total prayer time commitment per week, month, and year.

Track Bible verses memorized and estimate how long it will take to reach your memorization goal.

Track your spiritual disciplines — prayer, Bible reading, fasting, service, and fellowship — and see your weekly and yearly commitment.

Calculate your tithe and offerings from your income. See per-paycheck, monthly, and annual giving amounts.

Allocate your church budget across ministry areas including staff, facilities, missions, ministries, and administration.

Plan your sermon series — calculate dates, total sermons, and preparation time needed.

Track volunteer service hours and calculate annual contribution, team totals, and equivalent economic value.

Find out how old you would be on every planet in our solar system. Your age depends on each planet's orbital period around the Sun.

Planetary age, love compatibility, and biorhythm calculator for fun.

Calculate life expectancy based on age, gender, lifestyle factors, and health metrics. Uses actuarial science principles.

Calculate mortality rates, death probabilities, and survival probabilities using actuarial methods.

Calculate life insurance premiums using actuarial principles. Factors in age, gender, health status, and risk factors.

Calculate present value and future value of annuities. Supports ordinary and annuity due payments with various frequencies.

Calculate Value at Risk (VaR), Conditional VaR, and risk metrics for actuarial risk assessment.

Calculate pension benefits, present value, and retirement income using actuarial methods.

Calculate required actuarial reserves for insurance policies and pension plans using actuarial methods.

Calculate insurance loss ratios, expense ratios, combined ratios, and underwriting profitability metrics.

Calculate underwriting risk, expected losses, risk-adjusted premiums, and capital requirements for insurance policies.

Calculate claims frequency rates, pure premium, and loss per exposure unit for actuarial analysis.

Insurance premiums, annuity values, pension benefits, and claims analysis.

Life expectancy, mortality rates, reserves, and underwriting risk analysis.

Calculate orbital period using Kepler's laws. Find orbital velocity, angular velocity, and perihelion/aphelion distances.

Calculate escape velocity, orbital velocity, and gravitational parameters for celestial bodies.

Calculate stellar luminosity using Stefan-Boltzmann law. Find absolute magnitude, main sequence lifetime, and stellar parameters.

Calculate cosmological redshift, recessional velocity, distance, and lookback time using Hubble's law.

Calculate Schwarzschild radius, event horizon, ergosphere, Hawking temperature, and black hole parameters.

Calculate transit depth, duration, probability, and timing for exoplanet transits.

Calculate stellar mass using mass-luminosity relation, mass-radius relation, and orbital dynamics.

Calculate luminosity distance, comoving distance, angular diameter distance, and lookback time using cosmological models.

Calculate tidal forces, Roche limit, Hill sphere, and tidal locking timescales for celestial bodies.

Calculate Roche limit - the minimum distance a satellite can orbit before being torn apart by tidal forces.

Complete stellar physics calculations. Analyze luminosity, temperature, nuclear fusion, stellar evolution, black body radiation, and stellar distances.

Complete orbital mechanics calculations. Kepler's laws, Hohmann transfers, delta-v, Lagrange points, escape velocities, and relativistic effects.

Complete cosmology calculations. Hubble's law, cosmic distances, Big Bang timeline, dark matter/energy, CMB analysis, and black hole physics.

Calculate RSA key strength, equivalent symmetric key length, brute force time, and security margins.

Calculate hash collision probability using birthday paradox. Find collision probability and birthday bound for hash functions.

Calculate password entropy, brute force time, and security strength. Measure password complexity and cryptographic strength.

Calculate encryption key space size, brute force time, and security level for cryptographic algorithms.

Calculate birthday attack parameters, collision probability, time to collision, and attack feasibility for hash functions.

Calculate Diffie-Hellman key exchange parameters, shared secret, and security analysis.

Calculate ECC key strength, equivalent RSA key length, security level, and cryptographic parameters.

Calculate brute force attack time, cost, energy consumption, and feasibility for cryptographic systems.

Calculate certificate security level, validity period recommendations, and certificate strength analysis.

Calculate overall cryptographic security strength, equivalent key lengths, and security lifetime estimates.

Complete encryption strength analysis. Key strength, hash functions, cipher modes, post-quantum cryptography, and random number generation.

Comprehensive cryptographic attack analysis. Brute force, birthday attacks, side-channel risks, password strength, and key derivation security.

Calculate total parameters, weights, biases, and memory requirements for neural network architectures.

Calculate accuracy, precision, recall, F1 score, MCC, AUC, and other classification performance metrics.

Calculate gradient descent parameters, convergence rate, effective learning rate, and training time estimates.

Calculate backpropagation computational complexity, memory requirements, and operations for neural networks.

Calculate k-fold cross-validation splits, train-test splits, and data utilization for machine learning.

Calculate overfitting metrics, generalization gap, bias-variance trade-off, and model complexity analysis.

Calculate information gain, gain ratio, Gini gain, and feature importance for decision trees.

Calculate posterior probability, Bayes factor, likelihood ratio, and evidence strength using Bayes' theorem.

Calculate SVM parameters, support vectors, margin width, and complexity for support vector machines.

Calculate optimization convergence, computational cost, efficiency, and memory requirements for ML optimizers.

Complete neural network training analysis. Architecture design, learning rates, batch sizes, regularization, and activation functions.

Complete ML model evaluation. Classification metrics, regression analysis, cross-validation, ROC/AUC curves, and model comparison.

Complete ML algorithm analysis. KNN, decision trees, random forests, SVMs, clustering, and gradient boosting parameters and complexity.

Calculate quantum wave function properties including probability density, momentum, energy, and phase/group velocities.

Calculate quantum probability amplitudes, Born rule probabilities, phase angles, and normalization.

Calculate Heisenberg uncertainty limits for position-momentum and energy-time conjugate pairs.

Calculate quantum tunneling probability, transmission coefficient, and penetration depth through a potential barrier.

Calculate quantum entanglement measures including concurrence, von Neumann entropy, tangle, and Bell state fidelity.

Calculate energy eigenvalues, wave functions, and quantum states for infinite wells and harmonic oscillators.

Calculate atomic energy levels, transition energies, photon wavelengths, and spectral series for hydrogen-like atoms.

Calculate quantum measurement probabilities, expectation values, variance, and wave function collapse.

Calculate quantum superposition states, interference effects, coherence, and phase relationships.

Calculate quantum gate operations, output states, probabilities, and gate fidelity for quantum computing.

Calculate quantum decoherence time, coherence decay, purity, and fidelity degradation for quantum systems.

Calculate quantum teleportation fidelity, success probability, resource requirements, and teleportation quality.

Fundamental quantum mechanics calculations. Wave-particle duality, Heisenberg uncertainty, quantum harmonic oscillator, hydrogen atom, and spin.

Quantum phenomena calculations. Tunneling, photoelectric effect, Compton scattering, blackbody radiation, and quantum entanglement.

Complete quantum computing analysis. Qubit states, quantum gates, algorithm complexity, error correction, and hardware platforms.