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
Reset
Survey / Quant
For Statistical Significance
---
Participants needed for --% confidence.
OR
Interviews / Qual
For Insight Discovery
5
According to Nielsen Norman, 5 users reveal 85% of usability issues.
Start a project in Glaut →
TABLE OF CONTENT
Try Glaut
SUMMARISE WITH AI

Heading 1

Heading 2

Heading 3

Heading 4

Heading 5
Heading 6

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

Block quote

Ordered list

  1. Item 1
  2. Item 2
  3. Item 3

Unordered list

  • Item A
  • Item B
  • Item C

Text link

Bold text

Emphasis

Superscript

Subscript

Understand people
beyond numbers

AI-moderated voice interviews for insights at scale

Schedule a free demo
Glaut logo

Glaut is the only AI-native platform built for agencies and quantitative researchers.
MR firms use Glaut to add qual depth to quant surveys and deliver insights 5x deeper, 20x faster, with AI-moderated voice interviews (AIMIs) in 50+ languages.

COMPANY
Customers
Careers
We're hiring!
Greenbook DirectoryInsight PlatformsProduct Updates
LEGAL
Privacy PolicyTerms & ConditionsInformation Security Management policy
QUAL
Glaut vs. IDIGlaut vs. CATIGlaut vs. NPS
QUANT
Glaut vs. SurveysGlaut vs. Brand Trackers
© 2025 Glaut, Inc.
701 Tillery Street Unit 12-1806, Austin, Texas 78702, United States.