Random number generator: 1 to 100
Percentages, raffles, and d100 range
Why 1–100?
One hundred equally likely integers make this the default range for percentile rolls, “pick a number 1–100” icebreakers, and raffles with up to 100 tickets. Each outcome is 1 in 100. Use exclusions to remove scratched tickets and unique mode for sampling without replacement.
Odds for this range
There are 100 possible integers from 1 to 100. Any single draw is equally likely: 1 in 100. Drawing the same number twice in a row (with replacement) is 1 in 10,000.
Common uses for 1–100
- Percentile / d100 style rolls
- Raffles and giveaways with ≤100 numbered entries
- Classroom random call from a 100-person list
- Quick probability demos (exactly 1%)