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Significant Figures Calculator
Count significant figures, round to any number of them, and do sums with the right number of sig figs in the answer.
Free, no uploads, no sign-up. Runs 100% in your browser.
How Significant Figures Calculator works
All maths runs in your browser, instantly, with no account. Follows the textbook rules, and warns when trailing zeros are ambiguous.
Input: Number. Output: Text.
How to use Significant Figures Calculator
- Type a number.
- See which digits count.
- Round, or switch to Calculate for two values.
Tips
- Exact fractions are used where rounding would give wrong answers.
- Every tool works offline once the page has loaded.
Significant Figures Calculator FAQ
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
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