Number Generators
Random Number Generator With No Repeats
Generate unique random numbers with no duplicates. Set your range and how many you need, and every number comes out exactly once.
Random Number Generator With No Repeats
Unique draw from 1 to 49 · 6 results
Choose the range
How many numbers to generate
Up to 1000 per draw
How to use the no repeats generator
- Set the range the numbers should come from. Lottery presets are one tap away.
- Choose how many unique numbers you need. The count is capped at the size of the range.
- Press Generate unique numbers, and sort the set if you want it smallest first.
- Copy the set or download it as a CSV.
Why repeats happen sooner than you expect
An ordinary random draw allows repeats, and they arrive surprisingly early, a result known as the birthday problem. Drawing from a pool of 100, the chance that at least two numbers in the set match climbs like this.
| Numbers drawn from a pool of 100 | Chance of a repeat with an ordinary draw |
|---|---|
| 5 | 9.7% |
| 10 | 37.2% |
| 12 | 49.7% |
| 20 | 87.0% |
| 30 | 99.2% |
Twelve draws already collide about half the time, and from a pool of 1000 it only takes 38 draws to pass a 50 percent chance of a repeat (50.9%). This page removes the problem at the source: every number is taken out of the pool the moment it is drawn, so a repeat is impossible rather than merely unlikely.
Lottery lines and the odds behind them
Lottery lines are the classic no repeats draw, since a game never repeats a ball within one line. These are the settings for the big games, along with the number of possible main line combinations each matrix allows.
| Game | Numbers to draw | Range | Possible main lines |
|---|---|---|---|
| UK Lotto | 6 | 1 to 59 | 1 in 45,057,474 |
| Classic 6 of 49 | 6 | 1 to 49 | 1 in 13,983,816 |
| Powerball main line | 5 | 1 to 69 | 1 in 11,238,513 |
| Mega Millions main line | 5 | 1 to 70 | 1 in 12,103,014 |
| EuroMillions main line | 5 | 1 to 50 | 1 in 2,118,760 |
Each quick pick this tool produces is exactly one of those combinations, drawn with equal chance. For lines with bonus balls included, the dedicated lottery number generator builds the full ticket.
How the tool guarantees no duplicates
Behind the button, the whole range is laid out and shuffled with a Fisher Yates shuffle driven by the browser cryptographic random source, then the first numbers are taken off the top. Statisticians call this sampling without replacement. Every possible unique set has the same probability, which a naive draw and discard loop does not always achieve, and the draw stays fast even when the range holds thousands of numbers.
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Frequently asked questions
What does no repeats mean
Every number in the set is different. Once a value is drawn it is removed from the pool, so no duplicates can appear.
How many unique numbers can I draw
As many as the range holds. Asking for more than that is capped to the range, for example 60 unique numbers from 1 to 49 is trimmed to 49.
Is this good for lottery lines
Yes. Set the range to your game, for example 1 to 49, and the count to the balls drawn, and each line has no repeats.
Does sorting affect the draw
No. Sorting only orders the display. A sorted line is exactly as random as an unsorted one.
Is it free
Yes, free and with no sign up. Every draw runs in your browser and nothing you enter leaves your device.
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Need duplicates allowed instead? The random number generator has no repeats as an option you can switch off, and the random number list generator builds longer sets.