Browsers borrow tiny noises
When available, this tool uses crypto.getRandomValues(), which your OS seeds with hardware jitter, fan noise, and timing wiggles—real-world physics sneaks into every digit.
Hardware entropy
Random Number Generator — Integers & Decimals (Inclusive)
Range & Options
Bounds are inclusive after rounding to your chosen decimal places.
About the Random Number Generator
This random number generator helps you pick fair, unbiased numbers in any range you choose. It is useful for games, classroom activities, simulations, and quick calculations where you need an impartial roll. You can generate a single number or a list of results, choose integers or decimals, and keep the bounds inclusive so the minimum and maximum are always possible outcomes.
The concept is simple: the tool generates a random value between your minimum and maximum, then formats it to the number of decimal places you request. If you set decimal places to 0, you will get integers only. If you need two or three decimal places, the generator produces a value with that exact precision. Because the bounds are inclusive after rounding, edge values like 0, 10, or 2.50 are just as likely as any other number in the range.
How it works
The generator runs entirely in your browser. When available, it uses the Web Crypto API (crypto.getRandomValues()) for stronger randomness and falls back to Math.random() if needed. No input is sent to a server, which keeps your data private and the tool fast.
How to use it
- Enter the minimum and maximum values for your range.
- Choose the number of decimal places you want (0 for integers).
- Set how many results you want to generate.
- Enable "No repeats" if you want unique integers only.
- Click Generate to see the result or list.
Common use cases include rolling a virtual die, picking a random winner number, generating practice data for spreadsheets, creating sample values for testing, or selecting randomized parameters for experiments. Teachers can use it to build worksheets, developers can use it to create test fixtures, and players can use it as a fast digital dice roller.
- Minimum value: The smallest number that can be generated.
- Maximum value: The largest number that can be generated.
- Decimal places: Controls precision; 0 means integers only.
- Count: Generates a list of results in one click.
- No repeats: Prevents duplicates for integer lists.
If you want predictable, repeatable numbers for security keys or cryptographic purposes, use a dedicated secure tool. For everyday random selection, this generator offers a quick, clear, and flexible way to pick numbers with confidence.
5 Fun Facts about Random Numbers
Inclusive edges = no ghost values
By rounding min/max to your decimal places and sampling inclusively, edge values like 2.5 or 999 remain just as likely as the middle—even in decimal mode.
Fair ranges
Humans make bad dice
Asked to “think of a number 1–10,” people rarely pick 1 or 10; that bias is how casinos flag manual shuffles. Let the generator roll—it loves the edges we subconsciously avoid.
Cognitive bias
Decimals are scaled integers
Your decimal output is really an integer roll multiplied by 10^-dp. Want 4 decimal places? We roll 0–9999 uniformly, then drop the decimal point. Simple, fast, precise.
Math trick
Ping-pong balls still rule lotteries
Even in 2025, many lottery draws use air-blasted ping-pong balls because you can literally watch the randomness happen—a theatrical reminder of what this digital tool simulates.
Lottery lore
FAQs
Are the bounds inclusive?
Yes. Results are returned within the inclusive range [min, max] after rounding.
Can I generate integers only?
Absolutely—set decimal places to 0.
Is this cryptographically secure?
No. Math.random() is not suitable for cryptographic or security-critical needs. Use a cryptographically secure RNG for those scenarios.
Can I repeat results or generate multiple numbers?
This page outputs a single number per click. If you need multiple numbers, non-repeating lists, or seeding, consider creating a dedicated “Bulk RNG” tool or export feature.