Math & Statistics
Core mathematical tools from basic arithmetic to advanced statistics.
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Percentage Calculator
Calculate percentages easily — find a percentage of a number, percentage increase/decrease, and percentage change between two values.
Fraction Calculator
Add, subtract, multiply, or divide fractions. Get simplified results, mixed numbers, and decimal equivalents.
Standard Deviation Calculator
Calculate the mean, median, standard deviation, and variance for a set of numbers. Supports both population and sample calculations.
Probability Calculator
Calculate probability of single events, combined events (AND/OR), permutations, and combinations.
GPA Calculator
Calculate your semester GPA and cumulative GPA. Enter course grades and credit hours for an instant result.
Average Calculator
Calculate mean, median, mode, range, geometric mean, and harmonic mean of a set of numbers.
Quadratic Equation Solver
Solve quadratic equations (ax² + bx + c = 0). Find roots, discriminant, vertex, and axis of symmetry with a visual graph.
Logarithm Calculator
Calculate logarithms with any base. Get log base 10, natural log (ln), log base 2, and custom base logarithms instantly.
Scientific Notation Calculator
Convert numbers to scientific notation and engineering notation. Control significant figures and see coefficient and exponent.
Matrix Calculator
Perform matrix operations: addition, subtraction, multiplication, determinant, and transpose for 2x2 matrices.
Compound Growth Calculator
Calculate compound growth rate, final value, or initial value. Useful for investments, population growth, and business metrics.
Factorial Calculator
Calculate factorial (n!) and double factorial (n!!). Useful for permutations, combinations, and mathematical calculations.
Permutation & Combination Calculator
Calculate permutations and combinations. Essential for probability, statistics, and counting problems.
Linear Regression Calculator
Calculate linear regression line, slope, intercept, and R-squared. Find the best-fit line for your data points.
Standard Form Calculator
Convert numbers to standard form (scientific notation). Express large or small numbers in a×10ⁿ format.
Advanced Graphing Calculator
Plot functions, compute calculus operations, and explore advanced math with interactive graphs.
Scientific Calculator
Scientific calculator with multiple modes and expression input
Equation Solver
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.
Percentage Change Calculator
Calculate the percentage change between two values. See absolute change and percentage increase or decrease.
Percentage Increase Calculator
Calculate percentage increase from original to new value. Find the percent change between two numbers.
Percentage Decrease Calculator
Calculate percentage decrease from original to new value. Find the percent reduction between two numbers.
Ultimate Calculator
Scientific calculator, graphing, and unit conversions — all in one.
Random Number (seeded)
Deterministic pseudo-random integers from a seed (reproducible).