Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Probability
Sample Size Calculator
Determine the minimum sample size needed for a survey or experiment given your confidence level, margin of error, and population size. Prevents under-powered studies and over-budgeted data collection.
Fill in the required fields to see your result.
Probability
Lottery Odds Calculator
Find your odds of winning a lottery by computing how many equally likely ticket combinations exist. Use it before buying a ticket to see exactly how unlikely the jackpot really is.
Fill in the required fields to see your result.
Key differences
| Sample Size Calculator | Lottery Odds Calculator | |
|---|---|---|
| Category | Probability | Probability |
| Inputs required | 4 | 2 |
| Result | Required Sample Size (samples) | Probability of Winning |
| What it does | Determine the minimum sample size needed for a survey or experiment given your confidence level, margin of error, and population size. Prevents under-powered studies and over-budgeted data collection. | Find your odds of winning a lottery by computing how many equally likely ticket combinations exist. Use it before buying a ticket to see exactly how unlikely the jackpot really is. |