Standard Deviation Calculator — Free Online Tool
sigma, variance, mean, median for any dataset
Calculate standard deviation, variance, mean, median, range. Population or sample. Paste any number series.
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Standard deviation calculator
Calculate σ, variance, mean, median, mode, range for any dataset.
How to use this tool
- 1
Paste numbers
Separate with commas, spaces, or new lines.
- 2
Pick dataset type
Population (entire set) or sample (n-1 denominator).
- 3
See full stats
Mean, median, mode, variance, σ, range, min, max.
Frequently Asked Questions
Population vs sample σ
What σ tells you
Key Takeaways
- Standard Deviation Calculator is a free, browser-based calculator tool — sigma, variance, mean, median for any dataset.
- No signup, no downloads, no file uploads. Tools run in your browser; the few that need an outside service say so on the page.
- Works on desktop, tablet, and mobile. Install as a PWA for offline access.
How to Use Standard Deviation Calculator
- Open the tool: Launch Standard Deviation Calculator on Toololis — no account or download needed.
- Enter your data: Paste text, enter values, or select a file directly in your browser.
- Get instant results: Everything is processed locally — results appear immediately.
- Copy or download: Save your output or share it. Bookmark for quick access next time.
Standard Deviation Calculator — Quick Facts
- Price
- Free — no limits, no watermarks, no paywalls
- Privacy
- Processed in your browser. Tools that need an outside service say so on the page. Page views are counted (Google Analytics).
- Platform
- Any modern browser on desktop, tablet, or mobile
- Category
- Calculator Tools on Toololis
- Offline
- Works offline after first visit (Progressive Web App)
| Feature | Details |
|---|---|
| Tool | Standard Deviation Calculator |
| Category | Calculator |
| Signup Required | No |
| File Upload | None — processed in browser |
| Mobile Support | Fully responsive |
| Cost | Free forever |
Why Use Standard Deviation Calculator?
You should try Standard Deviation Calculator for a quick, private way to sigma, variance, mean, median for any dataset. Processing happens in your browser and files are never uploaded; the few tools that need an outside service say so on the page.
On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.