Survey Sample Size Calculator
Estimate for random sampling with conservative proportion 50%; population 0 omits finite-population correction.
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USDTHE NUMBERS, MADE CLEARInstant calculation
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Estimate for random sampling with conservative proportion 50%; population 0 omits finite-population correction.
Worked example
Inputs
- Confidence level: 95%
- Margin of error (percentage points): 5
- Population size (0 for unlimited): 0
Results
- Required sample size: 385
Estimate for random sampling with conservative proportion 50%; population 0 omits finite-population correction.
Reviewed:Common uses
Estimate for random sampling with conservative proportion 50%; population 0 omits finite-population correction.
BEHIND THE NUMBERSFormula & assumptions
n₀=z²×0.25/e²; n=ceil(n₀/(1+(n₀−1)/N))
Estimate for random sampling with conservative proportion 50%; population 0 omits finite-population correction.