Modular Arithmetic Calculator

Welcome to the Modular Arithmetic Calculator, which performs arithmetic modulo an integer (also known as "clock arithmetic"). Modular arithmetic is essential to many aspects of communication in today's world, including:

To use the Modular Arithmetic Calculator, enter a non-zero integer for the modulus m, and integers a and b below. Then press one of the operation buttons. The answer is displayed next to Result.

Modulus m =  
a =  
b =  
Result =  

Message:

Notes:

There were over 4000 requests for this page in April 2013. Please send any comments or suggestions for improving the Modular Arithmetic Calculator.

   Paul Trow's math page.

Copyright 2009 by Paul Trow