The Definitive
Calculator Site
30 categories. Real-time results. Beautiful charts. Free forever. The only calculator site you will ever need.
Real-Time Results
Results update instantly as you type. No clicking “Calculate” — just start entering values.
Visual Charts
Beautiful charts and graphs help you understand the numbers. Amortization curves, pie charts, projections.
Shareable Results
Share your calculations with a unique link. Your inputs are encoded in the URL so others see the same results.
30 Categories
From mortgage payments to BMI, temperature conversions to profit margins — we have a calculator for everything.
Loans & Debt
16 calculators
Investing & Retirement
12 calculators
Budgeting & Savings
13 calculators
Tax & Accounting
9 calculators
Real Estate
9 calculators
Construction & DIY
17 calculators
Health & Fitness
20 calculators
Cooking & Nutrition
14 calculators
Math & Statistics
19 calculators
Science & Engineering
14 calculators
Geometry & Measurement
13 calculators
Unit Conversions
10 calculators
Time & Date
9 calculators
Automotive
10 calculators
Travel & Geography
10 calculators
Business & Entrepreneurship
20 calculators
Legal & Professional
11 calculators
Education & Academic
11 calculators
Parenting & Family
10 calculators
Pet Care
11 calculators
Environmental & Sustainability
11 calculators
Weather & Climate
12 calculators
Sports & Recreation
12 calculators
Technology & Computing
19 calculators
Faith & Inspiration
10 calculators
Actuarial Science
12 calculators
Astrophysics & Astronomy
13 calculators
Cryptography & Security
12 calculators
Machine Learning & AI
13 calculators
Quantum Physics
15 calculators
Popular Calculators
Our most-used calculators. Try one now — results are instant.
Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and view a full amortization schedule. Compare different loan terms and interest rates.
Compound Interest Calculator
See how your money grows over time with compound interest. Visualize the power of compounding with monthly contributions.
Tip Calculator
Quickly calculate the tip amount and split the bill among any number of people.
Tip Splitter Calculator
Split the bill and tip evenly among multiple people. Calculate how much each person should pay including tip.
Auto Loan Calculator
Calculate your monthly car payment, total interest, and view a full repayment schedule. Includes sales tax and trade-in value.
Savings Goal Calculator
Find out how much you need to save each month to reach your savings goal. See how interest helps you get there faster.