Random Number Calculator
Generate one or more random whole numbers within a specified range.
About the Random Number Calculator
Random number generation is useful for games, drawings, sampling, and picking a winner fairly — this calculator generates one or more random whole numbers within any range you specify.
How It Works
The calculator uses a uniform random number generator to pick a value between your minimum and maximum (inclusive), rounding to a whole number, and repeats this for as many numbers as you request.
Random Number = floor(random() × (Max − Min + 1)) + Min, repeated for the requested count.
Worked example
Scenario: Picking 1 whole number between 1 and 100.
- Each whole number from 1 to 100 has an equal 1% chance.
- The number is drawn using your browser's cryptographic random generator where available.
- Ask for up to 50 numbers at once; repeats are possible.
Result: A single random whole number from 1 to 100, inclusive.
Random numbers and what “random” means here
A random-number tool is useful for casual selections, games, classroom activities, samples, and simulations. Unless a tool explicitly states that it uses a cryptographically secure source, its output should not be treated as suitable for passwords, security keys, gambling systems, or other security-sensitive decisions.
Tips and common mistakes
- Both the minimum and maximum can be drawn.
- Numbers can repeat when you draw several; draw one at a time and ignore repeats if you need unique values.
- Don't use it for lotteries or security keys that require audited randomness.
Assumptions & Limitations
- Each generated number is independent of the others — repeats are possible when generating multiple numbers unless you specifically need unique values.
- Uses a uniform distribution, meaning every number in the range has an equal chance of being selected.
- This is a standard pseudo-random generator suitable for games and informal drawings, not a cryptographically secure random number generator for security purposes.
- Does not currently support excluding duplicate values when generating multiple numbers.