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Random number generator 1 to 1000

Pick a random number between 1 and 1000 instantly. Pool mode draws every number exactly once — perfect for large raffles, giveaways, and surveys requiring unique picks across a wide range.

347
Press Space or Enter to generate
1–100 Custom
1000 remaining in pool 0 / 1000 drawn
Distribution
Player 1
Player 2
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What is a random number between 1 and 1000?

The 1–1000 range gives each integer exactly a 0.1% chance on every generate — ideal when you need a wide spread that rules out guessing. Common uses include large raffle draws (100–1000 tickets), assigning participant IDs in research studies, generating random sample points in data analysis, and running giveaways where ticket numbers run into the hundreds.

Pool mode for large raffles

Pool mode uses the Fisher-Yates algorithm to shuffle all 1000 numbers into a private queue. Each click draws the next number without replacement, guaranteeing uniqueness across the full draw. The progress bar shows how many remain. When the pool exhausts, it reshuffles automatically — or you can reset at any time. This is the most efficient way to run a large raffle without keeping a manual log.

Distribution: buckets of 100

After 10 generates, the distribution chart groups results into 10 buckets of 100 (1–100, 101–200, …, 901–1000). Over many generates, each bucket should fill at equal rate, providing visual proof that the generator shows no bias toward any portion of the 1–1000 range.

Frequently asked questions

Is this random number generator truly random?
This tool uses Math.random(), seeded from hardware entropy. Each of the 1000 integers has a 0.1% chance per generate — statistically uniform and unbiased for all practical uses.
What is pool mode for 1000 numbers?
Pool mode shuffles all 1000 numbers using Fisher-Yates and draws them one at a time without replacement. No number repeats until all 1000 have been drawn. The progress bar and counter keep track of where you are in the sequence.
Can I exclude specific numbers?
Yes. Click "Exclude numbers" and enter a comma-separated list. The generator will never produce those numbers. In pool mode, excluded numbers are removed before shuffling.
What if I need a custom range?
Use the custom range generator to set any min and max, and generate multiple numbers at once. This page is optimized specifically for the 1–1000 range.

Who uses this tool

Raffle organizers
Draw winners from pools of up to 1000 tickets. Pool mode guarantees each ticket number is drawn exactly once — no duplicates.
Researchers
Generate random participant IDs or sample points within a 1–1000 range. Pool mode ensures no ID is assigned twice.
Contest hosts
Run online giveaways where participants have ticket numbers up to 1000. Draw winners live with the pool mode progress bar.
Students
Explore randomness across a large range. The distribution chart shows how 1000 results spread across 10 equal buckets.