Click the number or press Generate — 1,000 possible outcomes
?With 1000 possible values from 1 to 1000, this generator is ideal for large lotteries, statistical sampling, and simulation. The midpoint is 501. Over 1,000 rolls, each number would appear approximately 1 times on average.
Probability: Each number from 1 to 1000 has exactly 0.1% probability on every roll. This is a discrete uniform distribution — there is no bias toward any particular value, and past results never influence future ones.
Common uses for this range: Large raffle draws, statistical sampling, page/item selection from large sets, simulation seeds.
This tool runs entirely in your browser. No data is sent to any server, no results are logged, and the generator re-seeds on every click.
Click the large number or press Generate. A random integer between 1 and 1000 is selected with 0.1% probability for each value. You can also adjust the range using the fields above.
Yes. Math.random() in modern browsers uses a cryptographically seeded algorithm producing a uniform distribution. Each of the 1,000 integers between 1 and 1000 has exactly equal probability.
The statistical mean of the range 1 to 1000 is 501. Over many rolls, your results will converge toward this value. The standard deviation is approximately 288.67.
Use our Number Generator to generate up to 20 numbers at once with a no-repeats option — ideal for lottery picks and random sampling.