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Random Number Generator
Generate a pseudo-random integer between an inclusive minimum and maximum for casual games, samples, and everyday decisions.
Random Number Generator
Generate random numbers instantly within any custom range. Perfect for games, contests, lotteries, giveaways, and decision making.
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How the Random Number Generator Works
1
Enter Minimum Value
Choose the lowest number in the range.
2
Enter Maximum Value
Choose the highest number in the range.
3
Generate Random Number
The calculator randomly selects a number within the chosen range.
4
View Result
See the generated random number instantly.
Random Number Formula
Math.floor(Math.random() × (max - min + 1)) + min
The generator creates a random integer within the selected range. Every number has an equal probability of being chosen.
Example Calculation
Input: Minimum = 1, Maximum = 100
Output: Random Number = 57
Common Uses
- • Lottery Numbers
- • Games
- • Giveaways
- • Contests
- • Decision Making
- • Statistics
- • Education
- • Random Sampling
Questions about this calculator
A Random Number Generator creates numbers randomly within a specified range.
Yes. You can enter any minimum and maximum values.
The generator uses JavaScript's pseudo-random algorithm which is suitable for most everyday uses.
It can be used for casual selections, but independently documented and auditable methods are better for regulated, high-value, or public prize draws.
Pseudo-random number generators use deterministic mathematical algorithms starting from a seed value to produce sequences that appear random, whereas true random number generators capture unpredictable physical phenomena like atmospheric noise or radioactive decay.
Generate an integer inside a range
Enter the smallest and largest permitted values, then select Generate. Both endpoints are included, so a range from 1 to 10 can return 1, 10, or any whole number between them. The minimum must not be greater than the maximum.
How the result is selected
The tool scales JavaScript's pseudo-random value to the size of your range, rounds down to a whole number, and adds the minimum. For a 1–6 range, this produces one of six possible integers and is useful for casual games, practice questions, sample choices, and everyday decisions.
Important limitation
This generator uses Math.random(). It is not a cryptographically secure source and should not be used for passwords, security tokens, encryption keys, gambling systems, or any draw that requires independently auditable randomness. It also generates one integer at a time rather than a unique shuffled list.
Example
With a minimum of 25 and a maximum of 30, the possible results are 25, 26, 27, 28, 29, and 30. That is six possible values because the range includes both endpoints.
Learn more
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