Pevlika Browser Apps

Margin of Error Calculator

Margin of error for surveys and sample means, with finite population correction.

Runs in your browser — nothing is uploaded
For a
Use 50% if unknown — it gives the largest (safest) margin.
Leave empty for a large population.

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How to use Margin of Error Calculator

  1. Enter your values — the unit for each field is shown next to it.
  2. The result updates instantly as you type.
  3. Copy the results, or change inputs to compare scenarios.

Formula & assumptions

MOE = z*·√(p(1 − p)/n)·√((N − n)/(N − 1))

Example: 1,000 responses at 95% confidence and 50% → ±3.1%.

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