Random Number Generator
Generate random integers or decimals with customizable range, count, and duplicate control.
Generated Numbers
History (last 5)
About the Random Number Generator
What is a Random Number Generator?
A random number generator produces numbers within a specified range using pseudo-random algorithms. It is useful for games, simulations, sampling, and decision-making.
How to Use
Set the minimum and maximum values, choose how many numbers to generate, pick integer or decimal type, and decide whether duplicates are allowed. Click Generate to see results.
Are the numbers truly random?
The tool uses JavaScript's Math.random(), which produces pseudo-random numbers suitable for most everyday purposes but not for cryptographic security.
Can I generate without duplicates?
Yes, uncheck "Allow Duplicates." Note that the range must be large enough to support the requested count.
How many numbers can I generate at once?
You can generate up to 100 numbers in a single run.
Is this tool free?
Yes, BestCalc's random number generator is completely free with no ads or registration required.