15 mod 4
15 mod 4 equals 3, since 15 = 4×3 + 3.
How to use this tool
- Enter dividend (a) and divisor (b) in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your remainder (a mod b) and the full breakdown beneath it.
15 divided by 4 is 3 remainder 3, so 15 mod 4 = 3.
Frequently asked questions
- What is the modulo operation?
- The modulo (%) returns the remainder of a division. For example, 17 mod 5 = 2 because 17 = 3×5 + 2.