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 / Percentage

One-Sample t-Test Calculator

Compute the t-statistic and degrees of freedom for a one-sample t-test from the sample mean, the population mean under H...

basic
15,049 4.9 1 min
Math

2 × 2 Matrix Multiplication Calculator

Compute the 2×2 matrix product C = A · B from the eight scalar entries: c₁₁ = a₁₁·b₁₁ + a₁₂·b₂₁; c₁₂ = a₁₁·b₁₂ + a₁₂·b₂₂...

basic
9,268 4.5 1 min
Math / Percentage

Weighted Grade Calculator

Compute a course grade as a weighted average of up to four components (e.g. homework, quizzes, midterm, final), given ea...

basic
20,849 4.5 1 min
Math / Percentage

GCD and LCM Calculator

Compute the greatest common divisor (GCD) and the least common multiple (LCM) of two positive integers using the Euclide...

basic
18,289 4.8 1 min
Math / Percentage

Covariance Calculator

Compute the sample covariance, population covariance, Pearson correlation r, and the slope of the regression line from t...

basic
8,460 4.5 1 min