Modular Arithmetic Calculator

Welcome to the Modular Arithmetic Calculator, which performs arithmetic modulo an integer m (called the modulus).

To use the calculator, enter a non-zero integer for the modulus m, and integers a and b below. Then press one of the operation buttons.

If you need to work with very large numbers — such as a googol (1 followed by one hundred zeros) — try the Big Integer Modular Arithmetic Calculator (Big MAC) instead.

    m =
     a =
     b =


Please send any comments or suggestions for improving the Modular Arithmetic Calculator.

   Paul Trow's math page.

Copyright 2009 by Paul Trow