Sample Size Calculator

This calculator computes the minimum number of necessary samples to meet the desired statistical constraints.

How sure you want to be that the results are accurate. Standard is 95%.
The margin of error you can tolerate (e.g., +/- 5%). Lower error requires more people.
%
Expected response distribution. Use 50% if unsure (it's the safest 'worst-case' scenario).
%
Total number of people in your target group. Leave blank if unknown or very large.
Calculate
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Survey / Quant
For Statistical Significance
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Participants needed for --% confidence.
OR
Interviews / Qual
For Insight Discovery
5
According to Nielsen Norman, 5 users reveal 85% of usability issues.
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Glaut is a vertical agentic workflow automation platform for customer research. Researchers use Glaut to produce research insights 20x faster and 3x cheaper, leveraging AIMIs (AI-moderated voice interviews) in 50+ languages.

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