Random Number Generator — Generate Random Numbers Free
Use this free random number generator to generate one or multiple random numbers between any minimum and maximum value. Choose integers or decimals, enable unique numbers to avoid duplicates and view your generation history.
Random Number Generator
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How to Use the Random Number Generator
Enter your minimum and maximum values, choose how many numbers to generate and select integers or decimals. Enable no duplicates to ensure each number is unique. Click Generate for instant results.
How Are Random Numbers Generated?
This calculator uses JavaScript’s Math.random() function which generates pseudo-random numbers — numbers that appear random and have no predictable pattern for practical purposes. For most uses including games, giveaways, sampling and testing this is perfectly sufficient.
Common Uses for Random Number Generators
Random number generators are used for picking lottery numbers, selecting random samples for research, generating test data, playing games and making random decisions when you want an unbiased choice.
FAQs
Are the numbers truly random?
They are pseudo-random — generated by an algorithm that produces unpredictable results for practical use. For casual use, games and selections this is equivalent to true randomness.
Can I generate the same number twice?
By default the no duplicates option is enabled. Untick this if you want the same number to appear more than once.
What is the maximum range I can use?
There is no maximum range limit — you can generate numbers across any range including very large numbers.
Is this calculator free?
Yes completely free with no sign-up needed.