FREE CALCULATOR
Random Number Generator
Generate one or more random integers within a range directly in your browser.
Random number(s)24
CALCULATOR GUIDE
About the Random Number Generator
Generate random integers within a range for casual selection, classroom tasks or simulations.
How to use this calculator
- Enter the values requested by the calculator and check their units.
- Choose assumptions that match the scenario you want to estimate.
- Review the result and change one input at a time to compare scenarios.
- Verify important decisions against the relevant agreement, institution or official guidance.
How the calculation works
The generator selects values within the requested bounds; duplicates depend on whether sampling is with replacement.
Example
A draw from 1 to 10 should remain within those endpoints; another draw may repeat a previous value.
Things to keep in mind
- Confirm the allowed range and whether repeated values are acceptable.
- Do not use a general-purpose generator for cryptographic keys or security-sensitive secrets.
- The result is an estimate based on the inputs and assumptions provided.
- Check applicable terms and official guidance before making financial, employment or academic decisions.
Frequently asked questions
Can a number appear twice?
Yes, unless the tool specifically selects unique values for a draw.
Are results guaranteed or official?
No. The tool provides an estimate or arithmetic result and may not include every real-world rule, fee or policy.
Can I compare scenarios?
Yes. Change one input at a time to see how it affects the result.