math ToolUpdated 2026-09-19
Random Number Generator
Generate unbiased random numbers for sweepstakes, games, statistical sampling, and randomized testing.
Formula & Mathematical Methodology
Random = floor(Math.random() × (Max − Min + 1)) + Min
Generates a uniform pseudorandom float between 0 and 1, scaled across the integer interval.
How to Use This Random Number Generator
- Specify the lower bound (Min) and upper bound (Max).
- Select how many numbers you need.
- Click Generate.
Step-by-Step Worked Example
Scenario: Random number between 1 and 100
1. Generate uniform float: e.g. 0.472
2. Scale to range: 0.472 × 100 = 47.2
3. Round to integer: 48
Final Calculated Result: Random integer in [1, 100]
What Does Your Result Mean?
Each number in the range has an equal theoretical probability of selection.
Common Practical Applications:
- Raffles and giveaways
- Statistical survey sampling
- Gaming and board games
Important Limitations & Assumptions:
- Max must be greater than or equal to Min.
Frequently Asked Questions
Is this random number truly random?
It utilizes cryptographically strong pseudorandom generation suitable for everyday sampling and gaming.
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