The classic long-division question — what’s left over when one number doesn’t divide evenly into another.
How it works
The dividend is divided by the divisor and rounded down to the nearest whole number to get the quotient; multiplying that back and subtracting from the dividend gives the remainder.
What this does not include
This does not include modular arithmetic notation or negative-number edge cases beyond standard truncated division.
How to use this calculator
- Enter the dividend and divisor.
Frequently asked questions
What does a remainder of 0 mean?
The divisor divides evenly into the dividend, with nothing left over.
Is this the same as the modulo operation in programming?
Yes, for positive numbers — the remainder here matches what most programming languages call the modulo (%) operator.
Why can’t the divisor be zero?
Division by zero is mathematically undefined — there’s no meaningful quotient or remainder when dividing by zero.
