Sample Size Calculator
Find out how many surveys you need to make decisions with real statistical confidence.
Study parameters
Don't know the exact size? Use 10,000,000 for an infinite population sample.
Confidence level
With 95% confidence, if you repeat the study 100 times, 95 will give results within the margin of error.
Audience type
Recommended sample
surveys
Estimated investment (USD)
$2,500 – $4,500
*Reference price. Varies by deliverables and complexity.
What does each parameter mean?
Population size
The total universe of people you could interview. For national studies or very broad categories, consider the population as "infinite" (over 1M).
Confidence level
Indicates how sure you want to be of your results. With 95%, if you replicate the study 100 times, 95 times you will get the same results within the margin of error.
Margin of error
The precision of your results. ±5% means that if 60% prefer your product, the real value is between 55% and 65%. A ±5% margin is the gold standard in research.
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