Online Tools and Calculator

Sample Size Calculator

Sample size needed for a survey.

%
%

Result

Fill in the fields and tap Calculate to see your result.

How to use the Sample Size Calculator

  1. Select confidence level.
  2. Enter margin of error.
  3. Enter expected proportion.
  4. Tap Calculate to see the result.
  5. Tap Reset to clear the fields and try again.

Last updated: 1 November 2026

Related tools

Binary & Hex CalculatorPercentage CalculatorPercentage Change CalculatorPercentage Difference CalculatorFraction CalculatorRatio Calculator