Math calculators

Everyday arithmetic, algebra, and geometry — worked out clearly.

Percentages, fractions, ratios, geometry, and the little calculations that come up all the time — with formulas you can reuse anywhere.

Calculators
244
Topics: All Percentage (75) Fractions (4) Geometry (63)
244 results
Math / Geometry

Slope Calculator

Find the slope of the line through two points, plus the line equation in slope-intercept form.

basic
18,011 4.4 1 min
Math / Percentage

Percent Difference Calculator

Compute the percent difference between two values — the absolute difference divided by their average, expressed as a per...

basic
8,483 4.2 1 min
Math / Geometry

Ellipse Calculator

Compute the exact area and Ramanujan-approximated perimeter of an ellipse from the lengths of its semi-major and semi-mi...

basic
16,491 4.8 1 min
Math / Percentage

Proportion Calculator

Solve a proportion a/b = c/d for any one of the four values, given the other three.

basic
10,927 4.4 1 min
Math / Geometry

Triangle Calculator

Solve a triangle from any valid combination of sides and angles — SSS, SAS, ASA, AAS, or SSA.

Featured basic
6,361 4.9 1 min
Math / Geometry

Cylinder Volume Calculator

Volume, lateral surface area, and total surface area of a right circular cylinder from radius and height.

basic
21,797 4.0 1 min
Math / Geometry

Cube Volume Calculator

Compute the volume, surface area, face diagonal, and space diagonal of a cube from its edge length.

basic
19,710 4.1 1 min
Math / Percentage

Average Calculator

Compute the arithmetic mean (average), median, mode, range, geometric mean, and harmonic mean of a list of numbers.

basic
11,909 3.9 1 min
Math / Percentage

Exponent Calculator

Compute powers of any base, including negative and fractional exponents, with full decimal precision.

basic
8,754 4.1 1 min
Math / Percentage

Logarithm Calculator

Compute the logarithm of any positive number in any base — change-of-base formula included.

basic
3,774 4.5 1 min
Math / Percentage

Nth Root Calculator

Find the nth root of any positive number — square roots, cube roots, and any custom n you choose.

basic
3,491 4.5 1 min
Math / Percentage

Modulo Calculator

Get the remainder and quotient of integer division — the building block of modular arithmetic.

basic
22,346 3.9 1 min
Math / Percentage

Matrix Inverse (2×2) Calculator

Compute the inverse of a 2×2 matrix [[a, b], [c, d]] = (1/det) × [[d, −b], [−c, a]], or flag the matrix as singular when...

basic
15,159 4.9 1 min