Find Out The Sample Size

This calculator computes the minimum number of necessary samples to meet the desired statistical constraints.

Confidence Level:	70% 75% 80% 85% 90% 95% 98% 99% 99.9% 99.99% 99.999%
Margin of Error:
Population Proportion:		Use 50% if not sure
Population Size:		Leave blank if unlimited population size.

Find Out the Margin of Error

This calculator gives out the margin of error or confidence interval of observation or survey.

Confidence Level:	70% 75% 80% 85% 90% 95% 98% 99% 99.9% 99.99% 99.999%
Sample Size:
Population Proportion:
Population Size:		Leave blank if unlimited population size.