🔢 Math Calculators

Sometimes you just need the answer: what is 17% of 240, how do these fractions add up, or what GPA do these grades make? This small, focused set of math calculators covers the questions that come up at school, at work and around the house. The percentage calculator handles discounts, increases and comparisons; the fraction and ratio calculators keep proportions straight; the average calculator and LCM calculator cover classroom staples; and the area calculator works out squares, rectangles, circles and more. The scientific calculator is there when basic arithmetic is not enough, with powers, roots and trigonometry.

Two tools deserve a special mention. The age calculator gives an exact age in years, months and days, and its partner, the chronological age calculator, works out an exact age on any test or assessment date — the format schools, clinics and developmental assessments rely on, including corrected age for premature babies. The GPA calculator turns letter grades into a grade point average for students tracking their standing.

Every result is instant, every tool is free with no signup, and everything runs in your browser on any device — equally handy for homework, invoices, recipes and quick checks at the counter.