Press Generate for a random number between 1 and 1000. Both ends are included and each of the 1000 numbers has exactly a 1 in 1000 chance.
Odds for numbers between 1 and 1000
Possible numbers
1000
Chance of any one number
1 in 1000 (0.10%)
Chance of repeating the last number
1 in 1000
Chance a given number appears at least once in 1000 picks
63.2%
Average result over many picks
500.5
Even / odd numbers
500 even, 500 odd
The last-but-one row surprises many people: even with 1000 picks, a particular number has a 36.8% chance of never coming up, because picks are independent.
What are the odds of getting a specific number between 1 and 1000?
Each number has a 1 in 1000 chance (0.10%) on every pick.
Can the same number come up twice in a row?
Yes, if repeats are allowed: the chance of repeating the previous number is 1 in 1000. Tick "No repeats" when picking several numbers to get all-different results.
Are 1 and 1000 included?
Yes. Both ends are included, so there are 1000 possible numbers.