Generate a random whole number from 1 to 2, for a coin-style 50/50 choice between two options.
Press Generate for a random number between 1 and 2. Both ends are included and each of the 2 numbers has exactly a 1 in 2 chance.
Odds for numbers between 1 and 2
Possible numbers
2
Chance of any one number
1 in 2 (50.0%)
Chance of repeating the last number
1 in 2
Chance a given number appears at least once in 2 picks
75.0%
Average result over many picks
1.5
Even / odd numbers
1 even, 1 odd
The last-but-one row surprises many people: even with 2 picks, a particular number has a 25.0% chance of never coming up, because picks are independent.
What a 1–2 range is used for
A random number between 1 and 2 is handy for a coin-style 50/50 choice between two options.
What are the odds of getting a specific number between 1 and 2?
Each number has a 1 in 2 chance (50.0%) 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 2. Tick "No repeats" when picking several numbers to get all-different results.
Are 1 and 2 included?
Yes. Both ends are included, so there are 2 possible numbers.