Tools
Sample Size Calculator
Calculate the ideal sample size for your survey to ensure statistically significant results.
Parameters
Population Size
The total number of people in the group you are trying to study.
Confidence Level
How sure you want to be that your results are accurate.
Margin of Error (%)
The range of error you are willing to accept.
5%
Estimated Proportion (%)
The expected percentage of the population that has the attribute you are measuring. Use 50% if unsure.
50%
Required Sample Size
385
This is the number of responses you need to collect.
To be 95% confident that your results are within a margin of error of 5%, you need to survey 385 people.