Generate a random whole number from 1 to 12, for a twelve-sided die (d12) or picking a month.
Press Generate for a random number between 1 and 12. Both ends are included and each of the 12 numbers has exactly a 1 in 12 chance.
Odds for numbers between 1 and 12
Possible numbers
12
Chance of any one number
1 in 12 (8.3%)
Chance of repeating the last number
1 in 12
Chance a given number appears at least once in 12 picks
64.8%
Average result over many picks
6.5
Even / odd numbers
6 even, 6 odd
The last-but-one row surprises many people: even with 12 picks, a particular number has a 35.2% chance of never coming up, because picks are independent.
What a 1–12 range is used for
A random number between 1 and 12 is handy for a twelve-sided die (d12) or picking a month.
What are the odds of getting a specific number between 1 and 12?
Each number has a 1 in 12 chance (8.3%) 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 12. Tick "No repeats" when picking several numbers to get all-different results.
Are 1 and 12 included?
Yes. Both ends are included, so there are 12 possible numbers.