Math Calculators

A full-function calculator with trig, logs, powers, and memory keys, right in your browser.

Add, subtract, multiply, or divide fractions and see the simplified result with steps.

Work out a percentage, a percent change, or reverse a percentage back to the original number.

The fast, no-frills percent tool — three of the most common percent questions in one compact form.

A clean four-function keypad calculator for everyday +, −, ×, ÷ arithmetic.

Divide two whole numbers with a full step-by-step bring-down, divide, multiply, subtract trace.

Generate one or many random numbers inside any range you set, with optional repeats allowed.

Raise any base to a power, including negative and fractional exponents, in one step.

Find the square root, cube root, or any nth root of a number with clear working shown.

Solve logarithms in any base, including natural log and common log, instantly.

Simplify a ratio or solve for a missing term in a proportion between two ratios.

List every factor of a number and break it down into its prime factorization.

Find the greatest common factor shared by two or more numbers in a click.

See every factor two or more numbers share, not just the greatest one.

Break any whole number into its prime factors with a full division trace.

Work out the least common multiple of a set of numbers, with the method shown.

Round any number to a chosen place value or number of significant figures.

Measure how far an experimental value strays from the accepted or true value.

Convert between binary and decimal, or add and subtract binary numbers directly.

Convert hexadecimal values to decimal or binary and perform basic hex arithmetic.

Solve any quadratic equation for its real or complex roots, with the discriminant shown.

Add, multiply, transpose, or find the determinant and inverse of a matrix.

Convert numbers to and from scientific notation and combine values in that format.

Track how a quantity decays over successive half-lives, or solve for the half-life itself.

Multiply, divide, or exponentiate numbers far too large for a standard calculator display.

Get the mean, variance, and standard deviation of a data set with full working shown.

Enter a list of numbers and instantly see the average, middle value, most frequent value, and spread.

Just the average — simple or weighted — for a quick list of numbers.

Turn a z-score or t-statistic into a p-value, one-tailed or two-tailed.

A broader statistics toolkit covering sums, counts, quartiles, and other descriptive measures.

Work out the probability of single or combined events, including complements and unions.

Determine how many respondents a survey needs for a given confidence level and margin of error.

Convert a raw value into a z-score to see how far it sits from the mean in standard deviations.

Build a confidence interval around a sample mean or proportion at any chosen confidence level.

Count the number of ways to arrange or choose items from a set, with or without order mattering.

Identify the pattern in an arithmetic or geometric sequence and extend it to more terms.

Solve any triangle's missing sides, angles, and area from just a few known values.

Find the missing side, angle, or area of a right triangle from any two known measurements.

Solve for a missing leg or the hypotenuse of a right triangle in one quick step.

Calculate the area of common shapes like squares, circles, trapezoids, and more.

Find the volume of cubes, spheres, cylinders, cones, and other everyday 3D shapes.

Work out the total surface area of common solids from their basic dimensions.

Get a circle's radius, diameter, circumference, and area from any single known value.

Find the slope, angle, and distance between two points on a coordinate plane.

Measure the straight-line distance between two points in a 2D or 3D coordinate system.