How to calculate random number
Uniform random integer between min and max (inclusive)
Worked example. Your number: 1.
Example inputs — Minimum: 1; Maximum: 1; How many numbers: 1; No repeats?: Repeats allowed. Starting values are illustrative.
From George Guju, founder of Calculyn · Educational calculator guidance, not professional advice.
How it works
Each whole number in your range has an equal chance of being picked. Change the inputs and calculate again for a fresh draw.
Assumptions & limitations
- Results are rounded for display.
Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators
Frequently asked questions
Is it truly random?
It uses your device's pseudorandom generator — fine for games and picks, not for cryptography or gambling.