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
63
Topics: All Percentage (75) Fractions (4) Geometry (63)
63 results
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
19,711 4.1 1 min
Math / Geometry

2D Rotation Matrix Calculator

Compute the entries of a 2-dimensional rotation matrix R(θ) = [[cos θ, −sin θ], [sin θ, cos θ]] and the result of rotati...

basic
22,121 4.2 1 min
Math / Geometry

Annulus (Ring) Area Calculator

Compute the area of an annulus (the region between two concentric circles) from the outer and inner radii: A = π · (R² −...

basic
21,421 4.8 1 min