What is the Random Number Generator?
Generate cryptographically secure random whole numbers within any range, with or without repeats. From percentages and fractions to logarithms and quadratic equations, these math calculators show exact results — using arbitrary-precision integers wherever whole-number answers can get very large.
How to use the Random Number Generator
- Enter your minimum, your maximum, your how many.
- Tick the options you need: no duplicates.
- Press the Generate button — press it again for a fresh result.
- Read the output: random numbers.
- Use the 📊 chart to see the result visually, then copy or share it.
Formula and method
Tips for better results
- Use the formula section on each page to check your homework method, not just the answer.
- For very large factorials, combinations and base conversions we use exact big-integer math.
- Floating-point results are rounded to 12 significant digits to remove binary noise.
Frequently asked questions
What does the Random Number Generator do?
Generate cryptographically secure random whole numbers within any range, with or without repeats.
How is it calculated?
The Random Number Generator uses this method: Uses crypto.getRandomValues with rejection sampling (no modulo bias).
Is the Random Number Generator accurate?
Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.
Is this tool free and private?
Yes — the Random Number Generator is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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