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Sample Size Proportion Calculator

Calculate sample size proportion with clear inputs, formula guidance, and practical result checks.

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Calculator Details

CategoryStatistics

Inputs2

UseFree

RunsIn your browser

Before You Calculate

Confirm the value for Expected proportion (%).
Confirm the value for Desired margin of error (%).

Why You Can Trust It

Calculations run instantly in your browser. Your entries aren't sent to or stored on a server.

Written By

Robert Threadgill
Founder

Founder of Simple Calculator Tools. Builds and tests every calculator on this site personally before publishing.

Expected proportion (%)

Desired margin of error (%)

Result

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