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

Ratio Simplifier

Reduce a ratio a:b to its lowest terms by dividing both terms by their greatest common divisor, and report the equivalen...

basic
16,857 4.5 1 min
Math / Percentage

Cohen's d Effect Size Calculator

Compute Cohen's d effect size = (M₁ − M₂) / SD_pooled, with rule-of-thumb interpretation (0.2 small, 0.5 medium, 0.8 lar...

basic
683 4.1 1 min