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Statistics Tool
Calculate Your Sample Size
Determine the ideal number of respondents for statistically significant results.
Recommended Sample Size
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Enter your values above to calculate
n
=
z2
×
p
×
(1 − p)
/
e2
―――――――――――――――――――――
1 + (z2 × p × (1 − p) / e2 × N)
―――――――――――――――――――――
1 + (z2 × p × (1 − p) / e2 × N)
n = sample size
z = z-score
p = proportion (0.5)
e = margin of error
N = population
