Sample Size Calculator

Find the statistically significant sample size for your next study.

Study Parameters
± %
%
Use 50% for the most conservative sample size.
Leave blank for large/unlimited populations.
Summary

Enter your survey requirements to determine how many responses you need for valid data.

Statistical Fact

A sample size of 1,067 is usually sufficient to achieve a 3% margin of error for even the largest populations (like the entire US adult population).

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