Math Calculators
Choose a tool. Enter your values. Understand your result.
Percentage Calculator →
Find a percentage of a number, one value as a percent of another, or percentage change.
Scientific Calculator →
Calculate arithmetic expressions, powers, roots, logarithms and trigonometric functions in degrees or radians.
Fraction Calculator →
Add, subtract, multiply or divide two fractions and simplify the result.
Statistics Calculator →
Calculate mean, median and sample or population standard deviation from a list of numbers.
Triangle Calculator →
Find perimeter and area from three side lengths.
Area Calculator →
Calculate a rectangle’s area and perimeter.
Volume Calculator →
Calculate the volume of a rectangular box.
Surface Area Calculator →
Calculate total surface area of a rectangular box.
Circle Calculator →
Calculate area, circumference and diameter from radius.
Pythagorean Theorem Calculator →
Find the hypotenuse from the two shorter sides.
Right Triangle Calculator →
Find the hypotenuse of a right triangle.
Distance Calculator →
Find straight-line distance between two points in a plane.
Slope Calculator →
Find a line’s slope from two points.
Quadratic Formula Calculator →
Solve ax² + bx + c = 0, including complex roots.
Exponent Calculator →
Raise a real number to a power.
Root Calculator →
Calculate an integer nth root.
Log Calculator →
Find a logarithm to a chosen base.
Half-Life Calculator →
Estimate remaining quantity after exponential decay.
Percent Error Calculator →
Compare a measured value with a nonzero accepted value.
Standard Deviation Calculator →
Calculate population and sample standard deviation from a data set.
Mean, Median, Mode, Range Calculator →
Summarize the central values and spread of a data set.
Average Calculator →
Find the arithmetic mean of a list of values.
Z-score Calculator →
Measure how many standard deviations a value is from the mean.
Confidence Interval Calculator →
Estimate a normal-approximation confidence interval around a mean.
Sample Size Calculator →
Estimate the sample size for a population proportion.
Probability Calculator →
Combine the probabilities of two independent events.
P-value Calculator →
Find the two-tailed probability for a standard-normal z statistic.
Permutation and Combination Calculator →
Count ordered selections and unordered combinations.
Ratio Calculator →
Scale a ratio to match a new first quantity.
Number Sequence Calculator →
Generate an arithmetic or geometric sequence.
Least Common Multiple Calculator →
Compare factors of two positive whole numbers.
Greatest Common Factor Calculator →
Compare factors of two positive whole numbers.
Common Factor Calculator →
Compare factors of two positive whole numbers.
Factor Calculator →
Find the factors of a positive whole number.
Prime Factorization Calculator →
Find the factors of a positive whole number.
Rounding Calculator →
Round a number to a chosen number of decimal places.
Scientific Notation Calculator →
Convert a finite number to coefficient × 10ⁿ.
Binary Calculator →
Add, subtract or multiply two binary integers.
Hex Calculator →
Add, subtract or multiply two hexadecimal integers.
Big Number Calculator →
Perform exact addition, subtraction or multiplication on large integers.
Long Division Calculator →
Find the whole-number quotient and remainder.
Basic Calculator →
Calculate arithmetic expressions using the on-page keypad.
Matrix Calculator →
Add or multiply two 2 × 2 matrices.
Random Number Generator →
Generate a uniformly selected random integer.
Aspect Ratio Calculator →
Find a proportional height from width and an aspect ratio.
Percentage Change Calculator →
Find the signed change from an original value to a new value.
Weighted Average Calculator →
Find a mean where each value has its own weight.
Find the right math operation
Choose percentage change when comparing an original value with a new one. Use a fraction calculator for arithmetic with numerators and denominators. Scientific expressions support grouped operations and selected functions; geometry tools use the shapes and measurements specified on each form.
For statistics, distinguish a sample from a whole population and check the assumptions of the selected model. Some tools support only a particular matrix size, distribution or geometric case. Their method and limits appear below the form.
A little help with the numbers
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