Overview
What Is a Modulo Calculator?
This tool calculates the modulo (remainder) when one number is divided by another - the amount left over after division.
Calculate the remainder of a division.
This tool calculates the modulo (remainder) when one number is divided by another - the amount left over after division.
Useful for math coursework and understanding modular arithmetic used in programming.
Input the number being divided.
Input the number you're dividing by.
The result updates automatically.
The remainder left over after dividing one number by another.
a mod b = a - (b × floor(a/b)), giving the remainder after complete division.
Checking if a number is even/odd, cycling through array indices, and various programming logic use modulo.
Yes, in that case the remainder equals the dividend itself.
1, since 10 divided by 3 is 3 with remainder 1.
No, calculations happen entirely in your browser.
This depends on the sign convention used - this calculator follows standard positive remainder convention for typical use cases.
The core concept is universal, though sign handling for negative numbers can vary slightly between languages.
Always 0, since 0 divided by any number leaves no remainder.
Yes, completely free with no sign-up required.