Rounding Calculator
Round a value by decimal places or significant figures, with a chosen mode.
Input Data
Value
Rounding mode.
Decimals
Results
Rounded value.
3
Explanatory note about the result.
四捨五入
At a glance:Rounds to decimals or significant figures by the chosen mode. Complements round-number and significant-figures.
Formula
rounded = round(value, mode).
How to Use
- Enter a value, mode and precision.
- The tool returns the rounded value.
Case Studies
1234 to 2 sig figs
1200.
FAQ
Sig figs vs decimals?
Sig figs count meaningful digits from the first non-zero; decimals count after the point.
Related Tools
References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.