Math Calculators

Averages, probability, permutations and combinations, prime numbers, area, and volume.

Area Calculator

Calculate the area of a square, rectangle, triangle, circle, or trapezoid: enter the lengths…

Check instantly whether a number is prime, and see its prime factorization, its divisors, how…

Enter two or more numbers and get the greatest common divisor and the least common multiple at…

Enter a number from 0 to 500 and see n!

Work out the volume and surface area of a cube, rectangular prism, cylinder, sphere, or cone…

Enter the coefficients and get the discriminant, the real or complex roots, the vertex, and a…

Turn favorable and total outcomes into a probability as a fraction and a percentage, or switch…

Enter n and r to get P(n, r) and C(n, r) at once, see the r!