Education & Math Tools
Significant Figures Calculator
Enter a number and a target number of significant figures to round it correctly.
3.14
Very large or very small results may be shown in scientific notation (e.g. 1.23e+5) — that's the correct sig-fig-preserving representation, not a display bug.
How to use this tool
- 1Enter your number.
- 2Enter the number of significant figures wanted.
- 3See the rounded result.
Frequently asked questions
Why does the result sometimes show scientific notation?+
That's the correct way to preserve exactly the requested number of significant figures for very large or very small numbers — not a display error.