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

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
22,120 4.2 1 min
Math

Tetrahedral Number Calculator

Compute the n-th tetrahedral number Te_n = n(n + 1)(n + 2) / 6 — the number of stacked spheres in a tetrahedron with n s...

basic
23,277 4.3 1 min
Math / Percentage

Newton's Method Step Calculator

Perform one Newton-Raphson iteration to refine an estimate of a root: x_{new} = x − f(x) / f'(x), given the current esti...

basic
24,565 4.1 1 min
Math

Permutations (nPr) Calculator

Compute the number of permutations P(n, r) — the number of ways to arrange r items from n distinct items where order mat...

basic
20,393 4.5 1 min