Math Calculators

These 56 maths calculators cover what students, teachers and engineers look up most. Percentage questions go to the Percentage Calculator or Percentage Change. The Fraction Calculator adds, subtracts, multiplies and divides fractions and mixed numbers exactly. Algebra tools solve quadratic and cubic equations, work with matrices and complex numbers, and build truth tables. Geometry tools find areas, volumes and surface areas, solve triangles from three sides, two sides and an angle, or two angles and a side, including the ambiguous two-solution case and handle 2D and 3D vectors.

Behind the scenes, number tools use exact arithmetic with big integers and true fractions, so repeating decimals, very large factorials and long Fibonacci numbers come out right rather than rounded. The Prime Checker uses a primality test that is deterministic for numbers up to about 3.3 x 10^24, and Mean, Median and Mode gives the full set of summary statistics. Answers can be copied straight into homework or a spreadsheet.