Tools

Sample Size Calculator

Enter three lines: population size (or "infinite"), confidence level (90, 95, or 99), margin of error % (e.g. 5). Uses the Cochran formula with finite population correction. Outputs required sample size and a comparison table.

Population (line 1), Confidence % (line 2), Margin of Error % (line 3)

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Sample Size Results

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marduc812

2026