Round to the Nearest Thousandth Calculator
Use this tool to calculate the rounding to the nearest thousandth of any number you want, with the possibility to use many rounding methods.
Rounded3,456.789to the nearest 0.001
Rounded down (floor)3,456.789
Rounded up (ceiling)3,456.789
Truncated3,456.789digits simply dropped
Difference from the original0
At every place value
| Nearest | Result |
|---|---|
| 0.01 | 3,456.79 |
| 0.1 | 3,456.8 |
| 1 | 3,457 |
| 10 | 3,460 |
| 100 | 3,500 |
| 1000 | 3,000 |
The method
round to the nearest multiple of the chosen place
Rounding, flooring and truncating differ
Rounding goes to whichever multiple is closer. Floor always goes down and ceiling always goes up — including for negatives, where floor(−2.3) is −3, not −2. Truncating just discards digits, so it rounds towards zero and behaves differently from floor on negative numbers.