Significant Figures Rounder
Round any number to a chosen number of significant figures, with the rounding error.
Results
Result
0.034600000000
Exponent
-2
Difference
0.000032200000
What this tool does
Significant figures say how much of a number is actually known, which is why laboratory reports and engineering specifications use them instead of decimal places. Rounding 0.0345678 to three significant figures gives 0.0346, not 0.035.
Formula
rounding to n significant figures
Variables
| Symbol | Meaning | Unit |
|---|---|---|
x | Value | — |
n | Significant figures | — |
R | Result | — |
E | Exponent | — |
D | Difference | — |
Worked example
- Value0.0345678
- Significant figures3
- Result0.034600000000
- Exponent-2
- Difference0.000032200000
Limitations
- The calculation runs at full precision and only the display is rounded. If you copy an intermediate value and retype it, small differences can appear.