How to use this tool
Check the units, enter your values, and run the tool. Results follow the assumptions and method below.
Calculation method
Required sample size
ceil(z^2*p*(1-p)/error^2)Sample Size Calculator
Normal approximation for a proportion under simple independent sampling; excludes finite-population correction and nonresponse.
Normal approximation for a proportion under simple independent sampling; excludes finite-population correction and nonresponse.
Result
Enter your values and run the tool to see your result.