Random Number Generator
By Miikka · CalcBrew · Updated
This random number generator draws one or several numbers from any range you choose in an instant. It suits prize draws, games, sampling and any situation where you need a fair, unbiased random number.
How the calculator works and what it’s for▾
How a number is drawn
You set a lower and an upper bound, and the generator picks a number between them so that every option is equally likely. You can also request several numbers at once when you need, for example, multiple winners.
Each draw is independent of the others, so the previous result does not steer the next.
What the generator is used for
Typical uses include contest draws, random ordering, brainstorming lottery rows and research sampling. It is also handy in teaching to illustrate probability.
You can use it instead of physical raffle tickets or dice whenever you want a fast, repeatable way to draw.
Tips for drawing
Decide whether the same number may repeat or whether you want unique numbers — for a winner draw, for instance, you usually want to avoid repeats.
Set the bounds carefully, because they define exactly which numbers can be included in the draw.
🔄 Reviewed June 2026
Frequently asked questions
Cite this calculator
CalcBrew. (2026). Random Number Generator. https://calcbrew.com/random-number-generator“Random Number Generator.” CalcBrew, 2026, calcbrew.com/random-number-generator.Link to https://calcbrew.com/random-number-generator. Results are estimates; cite the underlying formula or data source for academic work.
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