Everyday Math

Everyday math calculators handle the arithmetic, geometry and algebra people look up most. Start with the percentage calculator, the discount calculator and the tip calculator for money sums, or the fraction calculator for fraction work.

For number skills there are calculators for GCF, LCM, factors, prime factorization, exponents, roots, logarithms, rounding, long division, big numbers, scientific notation, Roman numerals and random numbers. Geometry tools cover area, volume, surface area, circles, triangles, right triangles, the Pythagorean theorem and slope. Algebra tools include the quadratic calculator, a 2×2 matrix calculator, ratios, number sequences, permutations and combinations, and percent error. The scientific and basic calculators handle general sums, and the currency converter applies a live exchange rate.

Each page shows the formula and a worked example, so you can follow the steps and check the answer by hand, which is useful for homework. Read how to calculate a percentage increase for a step-by-step example.