Sample Size Calculator

Finding out the size of sample best suited for your research needs, or the gauging the confidence interval is easy and fast, with our online calculator.

% (ci)
(N)
Leave blank for infinite population.

Assumes a proportion (response distribution) of 50%.

(n)


Calculate Confidence Interval:

(n)
(N)
Leave blank for infinite population.
(p) %
% (ci)