Random Number Generator
A random number generator tool gives you a number between a minimum and maximum value. It is useful when you need a quick unbiased pick without making the choice yourself. This is a utility page first. People use it for raffles, classroom selection, games, testing, quick decisions, and any task where a simple random result is enough.
Quick answer
Each result is picked randomly within the range you set — every value has an equal chance.
What this tells you
- •Each result is picked randomly within the range you set — every value has an equal chance.
- •Running the generator again may produce the same number unless duplicates are disabled.
- •Results are generated instantly in your browser and are not stored anywhere.
- •This tool assumes pseudo-random output is acceptable for everyday non-cryptographic tasks.
How to Use
- 1Enter the minimum number
- 2Enter the maximum number
- 3Adjust any extra settings if available
- 4Generate a result
- 5Run it again if you need another pick
How It Works
Formula
R = Math.floor(Math.random() * (max - min + 1)) + minThe tool uses pseudo-random logic to produce a value inside the range you define. In normal use, that means each allowed number has an equal chance of being selected. For most everyday tasks, pseudo-random output is more than enough. It is suitable for simple picks, games, classroom choices, and quick testing workflows.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Raffle numbers
Possible use cases for the same setup: pick a raffle winner, choose a student number in class, assign a turn order in a game, test a feature with random sample values
Common mistakes
- Setting the minimum higher than the maximum
- Forgetting that a new result can repeat a previous one
- Using too small a range for the kind of random spread you want
- Expecting the same number of times to produce evenly spaced results in a short run