Math & Numbers

Random Number Generator

Generate random numbers within a custom range.

Set a minimum and maximum value and how many numbers to generate, then click Generate for instant random numbers.

Enter a valid minimum.
Max must be greater than min.

Result

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How to Use This Tool

  1. Set your minimum and maximum values.
  2. Choose how many numbers to generate and whether duplicates are allowed.
  3. Click Generate for your random number(s).

How This Generator Works

This tool uses JavaScript's built-in pseudorandom number generator to produce numbers uniformly distributed across your chosen range — suitable for games, raffles, sampling, and everyday randomization needs.

Pseudorandom vs. True Random

Like most software random number generators, this uses a pseudorandom algorithm — deterministic but designed to appear statistically random. For everyday purposes (games, drawings, sampling), this is indistinguishable from true randomness. For cryptographic or security purposes, a cryptographically secure random number generator is required instead.

Unique vs. Non-Unique Generation

With duplicates allowed, each number is drawn independently, so repeats are possible (like independent dice rolls). With uniqueness enforced, each number is removed from the pool once drawn, similar to drawing raffle tickets without replacement.

Frequently Asked Questions

Is this generator truly random?

It uses a pseudorandom algorithm, which is statistically indistinguishable from true randomness for everyday purposes like games and drawings, but isn't suitable for cryptographic or security-critical applications.

What's the difference between allowing and not allowing duplicates?

Allowing duplicates draws each number independently (like separate dice rolls, where repeats are possible); disallowing duplicates draws without replacement (like a raffle), ensuring every generated number is unique.

This calculator is provided for general informational and estimation purposes only. Results should not be treated as professional financial, tax, legal, medical, or engineering advice. Always verify critical calculations with a qualified professional or official source before making decisions.