Math Calculators
Percentage, average, ratio, standard deviation, fraction, area, and scientific calculators.
Explore our collection of free math calculators and tools. Each calculator runs instantly in your browser, works offline, and includes detailed explanations, formulas, and examples. Choose a tool below to get started.
Percentage Calculator
Calculate percentages, find what percent a number is of another, and percentage change.
Average Calculator
Calculate mean, median, mode, range, and standard deviation from a data set.
Ratio Calculator
Simplify ratios, solve for missing values, and scale ratios up or down.
Standard Deviation Calculator
Calculate population and sample standard deviation, variance, and mean.
Fraction Calculator
Add, subtract, multiply, divide, and simplify fractions with step-by-step results.
Area Calculator
Calculate area of rectangle, circle, triangle, and square with formulas.
Scientific Calculator
Advanced calculator with trigonometry, logarithms, exponents, factorial, and constants.