Is this Sample Size Calculator free to use?

Yes, Sample Size Calculator is 100% free to use online with no installation or account required.

How do I use the Sample Size Calculator?

Simply enter your values into the required input fields and click calculate to view the results instantly.

Yes, the calculator is fully responsive and compatible with Android, iOS, Windows, macOS, and Linux web browsers.

Sample Size Calculator — Free Online Tool

📊

Calculate the required sample size for surveys and studies

Formula: $n = \frac{Z^2 \cdot p \cdot (1 - p)}{e^2}$. Enter Z-score, sample proportion ($p$), and margin of error ($e$) below.

Parameters Input

Z-score (Z)

Proportion (p)

Margin of Error (e)

⚠️ For educational purposes only. Verify results with a qualified professional when making important decisions.

Our professional calculator tools are designed to provide accurate, fast, and reliable results for financial, health, and everyday calculations.

All calculations are processed instantly in your browser with real-time output.

Your data is never stored. Everything runs locally for complete privacy.

Built using verified mathematical formulas to ensure precise and reliable results.

Fully responsive design works smoothly on desktop, tablet, and mobile devices.

From EMI to BMI and GST, access multiple calculators in one place.

Professional UI with clean layout, smooth animations, and easy navigation.