Sample size calculator for needs assessments and KAP surveys

The following calculator will help you find an appropriate sample size for a needs assessment survey, a KAP survey, or any other kind of survey intended to provide a "snapshot" of a population at a given point in time. The results of the survey can be used to draw conclusions about the population as a whole, and can provide useful inputs on the design and planning of interventions. To measure change over time in the same population, see our Baseline and endline sample size calculator.

Measuring a percentage

You can expect results like:

References

See the Note on formulas