Sample Size Calculator
Calculate the ideal survey sample size from population, margin of error and confidence level.
About Sample Size Calculator
Calculate the ideal survey sample size from population, margin of error and confidence level.
Sample Size Calculator cleans up and restructures data without spreadsheet gymnastics — paste your data, choose the format, and copy or download the result.
How to Use Sample Size Calculator
- Paste or import your data into the input area.
- Choose the format or transformation you need.
- Check the live preview of the output.
- Copy the result or download it as a file.
Key Features
- Works with CSV, TSV, JSON and other common data formats.
- Live preview so you always know what you will get.
- Handles large datasets without slowing down.
Frequently Asked Questions
How much data can Sample Size Calculator handle?
Sample Size Calculator is designed for practical datasets — spreadsheets, exports and logs of typical size process instantly in your browser.
Is Sample Size Calculator free to use?
Yes. Sample Size Calculator is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. Sample Size Calculator runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does Sample Size Calculator work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.
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