Coprime Calculator

Coprime (or Relatively Prime or Mutually Prime) numbers
have no common factors other than 1

Enter two numbers and see the results live:


Notes About Coprimes

Coprimes have no common factors (other than 1) so the greatest common factor of coprimes is 1

When we simplify a fraction as much as possible, then the top and bottom numbers (the numerator and denominator) are coprime.

If the top and bottom numbers of a fraction are not coprime, then we can simplify it more.