In computing and mathematics, the modulo operation returns the remainder or signed remainder of a division, after one number is divided by another, the latter being called the modulus of the operation.

Aug 1, 2025 · Modulo calculator finds a mod b, the remainder when a is divided by b. The modulo operation returns the remainder in division of 2 positive or negative numbers or decimals.

Mar 13, 2026 · Modulo is the remainder after division. Learn how it works, what the % symbol means in code, and where it shows up in everyday math and programming.

Modulo is an operation that gives you the remainder when one number is divided by another. For example, 17 modulo 5 equals 2, because 17 ÷ 5 = 3 with a remainder of 2.

The modulo (or modulus or mod) is the remainder after dividing one number by another. Because 1009 = 11 with a remainder of 1.

May 13, 2026 · For two integers a and b, and a positive integer n, we say that a is congruent to b modulo n if their difference is an integer multiple of n. This is denoted as:

Calculate modulo instantly with our modulo calculator. Learn how modulo works, how to calculate modulo by hand, how to do modulo on a calculator, and key modulo calculation rules.