Math calculators
Work through it, one calculation at a time.
From a quick percentage to an equation or a set of observations, find a tool that fits the problem. Check your inputs, follow the method and use the result in your next step.
Browse the calculatorsA place to start
Tools for common questionsPercentage Calculator
Calculate a percentage, compare two values or find percentage change.
Open calculator →02 / MathFraction Calculator
Add, subtract, multiply or divide two fractions.
Open calculator →03 / MathScientific Calculator
Evaluate arithmetic expressions with parentheses and powers.
Open calculator →Explore math
44 toolsEveryday arithmetic
7Basic Calculator
Evaluate arithmetic expressions with parentheses and powers.
Fraction Calculator
Add, subtract, multiply or divide two fractions.
Percent Error Calculator
Compare a measured value with an accepted value.
Percentage Calculator
Calculate a percentage, compare two values or find percentage change.
Ratio Calculator
Simplify an integer ratio.
Rounding Calculator
Round a number to a chosen decimal place.
Scientific Calculator
Evaluate arithmetic expressions with parentheses and powers.
Algebra & numbers
15Big Number Calculator
Perform exact integer arithmetic without floating-point rounding.
Binary Calculator
Perform exact integer arithmetic without floating-point rounding.
Common Factor Calculator
Find integer factors or multiples.
Exponent Calculator
Raise a number to a power.
Factor Calculator
Find integer factors or multiples.
Half-Life Calculator
Estimate exponential decay.
Hex Calculator
Perform exact integer arithmetic without floating-point rounding.
Least Common Multiple Calculator
Find integer factors or multiples.
Log Calculator
Find a logarithm in any positive base other than 1.
Long Division Calculator
Perform exact integer arithmetic without floating-point rounding.
Matrix Calculator
Add or multiply two rectangular matrices.
Number Sequence Calculator
Calculate a term and sum of an arithmetic or geometric sequence.
Prime Factorization Calculator
Find integer factors or multiples.
Quadratic Formula Calculator
Solve ax² + bx + c = 0, including complex roots.
Root Calculator
Find the real nth root of a number.
Geometry & measurement
9Area Calculator
Calculate areas for common shapes using their dimensions.
Circle Calculator
Work with a circle's radius, diameter, circumference or area.
Distance Calculator
Calculate the slope and distance between two Cartesian points.
Pythagorean Theorem Calculator
Find the hypotenuse, area and acute angles from two perpendicular sides.
Right Triangle Calculator
Find the hypotenuse, area and acute angles from two perpendicular sides.
Slope Calculator
Calculate the slope and distance between two Cartesian points.
Surface Area Calculator
Calculate volume and surface area for common solids.
Triangle Calculator
Solve a triangle from its three side lengths.
Volume Calculator
Calculate volume and surface area for common solids.
Statistics & probability
13Average Calculator
Find the arithmetic mean of a set of values.
Confidence Interval Calculator
Estimate a normal-approximation confidence interval for a mean.
GCF Calculator
Find a common factor for the whole numbers you enter.
Mean, Median, Mode, Range Calculator
Summarize a set of numbers.
P-value Calculator
Convert a z statistic into a normal-distribution p-value.
Permutation and Combination Calculator
Count ordered and unordered selections without replacement.
Probability Calculator
Combine two independent event probabilities.
Random Number Generator
Generate uniformly distributed integers in a chosen range.
Sample Size Calculator
Estimate a survey sample size for a population proportion.
Scientific Notation Calculator
Convert between decimal and scientific notation.
Standard Deviation Calculator
Explore the spread of a set of numbers around its mean.
Statistics Calculator
Summarize a set of numbers.
Z-score Calculator
Measure how many standard deviations a value is from the mean.