Free Math Calculators
Percentage, fractions, algebra, geometry, and unit conversion tools. All tools are free, accurate, and require no account.
Percentage Calculator
Calculate percentages, percent change, and percent of a number.
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52 calculatorsPercentage Calculator
Calculate percentages, percent change, and percent of a number.
Percent Change Calculator
Calculate the percentage change between two values — increase or decrease.
Percentage Increase Calculator
Calculate the percentage increase from one value to another.
Fraction Calculator
Add, subtract, multiply, and divide fractions instantly.
Long Division Calculator
Solve long division problems step by step with quotient and remainder.
Graphing Calculator
Plot and analyze mathematical functions on an interactive graph.
Square Root Calculator
Find the square root or nth root of any number.
Scientific Calculator
Full-featured scientific calculator for complex calculations.
Standard Deviation Calculator
Compute standard deviation and variance for statistical data.
Quadratic Formula Calculator
Solve quadratic equations using the quadratic formula.
Ratio Calculator
Simplify ratios, solve proportions, and scale ratios step by step.
Discount Calculator
Calculate the final price after any discount percentage and optional tax.
Margin Calculator
Calculate profit margin, markup percentage, and selling price from cost.
Exponent Calculator
Calculate powers and exponents for any base and exponent value.
Logarithm Calculator
Compute natural log, base-10 log, or any custom base logarithm.
Triangle Calculator
Solve triangles — find missing sides, angles, area, and perimeter.
Area Calculator
Calculate area of circles, rectangles, triangles, and more shapes.
Volume Calculator
Find volume and surface area of 3D shapes including spheres, cylinders, and cubes.
Pythagorean Theorem Calculator
Solve for any side of a right triangle using the Pythagorean theorem.
GCF Calculator
Find the greatest common factor of two or more numbers with prime factorization.
LCM Calculator
Calculate the least common multiple for any set of numbers.
Prime Factorization Calculator
Break down any number into its prime factors with step-by-step division.
Random Number Generator
Generate random numbers within any range instantly.
Average Calculator
Calculate mean, median, mode, range, and standard deviation for any dataset.
Unit Converter
Convert between metric and imperial units for length, weight, temperature, volume, speed, area, time, and data.
Currency Converter
Convert between 30 world currencies using approximate mid-market exchange rates.
Binary Calculator
Convert between binary, decimal, octal, and hexadecimal. Perform binary arithmetic and bitwise operations.
Roman Numeral Converter
Convert between Roman numerals and Arabic numbers with symbol breakdown.
Probability Calculator
Calculate single event, multiple event, and conditional probability.
Statistics Calculator
Compute key statistics including mean, variance, skewness, and quartiles.
Sample Size Calculator
Determine the sample size needed for a statistically significant survey.
Mean Median Mode Range Calculator
Find the mean, median, mode, and range of any data set instantly.
Z-Score Calculator
Calculate the z-score and corresponding percentile for any data point.
Confidence Interval Calculator
Calculate confidence intervals for population means and proportions.
Slope Calculator
Find the slope, distance, and equation of a line between two points.
Circle Calculator
Calculate area, circumference, radius, and diameter of a circle.
Surface Area Calculator
Calculate the surface area of 3D shapes including spheres, cubes, and cylinders.
Right Triangle Calculator
Solve right triangles — find missing sides and angles with step-by-step solutions.
Distance Calculator
Calculate the distance between two points in 2D or 3D space.
Percent Error Calculator
Calculate the percent error between an experimental and theoretical value.
Hex Calculator
Perform arithmetic and conversions with hexadecimal numbers.
Permutation and Combination Calculator
Calculate permutations and combinations for any n and r values.
Factor Calculator
Find all factors and factor pairs of any positive integer.
Matrix Calculator
Add, subtract, multiply matrices and calculate determinants and inverses.
P-Value Calculator
Calculate the p-value from a test statistic for z, t, chi-square, or F tests.
Half-Life Calculator
Calculate the remaining quantity after radioactive or exponential decay.
Rounding Calculator
Round numbers to any decimal place, significant figure, or fraction.
Scientific Notation Calculator
Convert numbers to and from scientific notation and perform arithmetic.
Big Number Calculator
Perform arithmetic with arbitrarily large numbers beyond normal precision.
Number Sequence Calculator
Find the next terms and formula for arithmetic and geometric sequences.
Common Factor Calculator
Find all common factors shared between two or more numbers.
Basic Calculator
A simple calculator for addition, subtraction, multiplication, and division.
Explore Other Categories
We cover all major calculator categories for your everyday needs.
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Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and amortization schedule.
Amortization Calculator
See your full loan amortization schedule with principal and interest breakdown by month.
Loan Calculator
Estimate monthly payments and total cost for any personal or auto loan.
Car Payment Calculator
Calculate your monthly car payment and total loan cost based on price, rate, and term.