Round Nearest Thousandth Calculator

Rounded value
1,234.567
Rounding Calculator
Rounded value (formatted)
1,234.567
Rounded minus original
0
Rounded toward -infinity
1,234.567
Rounded toward +infinity
1,234.567
Rounding step (place value)
0.001
Rule applied
3 decimal places, round half away from zero
Worked out from IEEE Std 754-2019, Standard for Floating-Point Arithmetic, ยง4.3 Rounding-direction attributes (roundTiesToEven, roundTowardZero, roundTowardPositive, roundTowardNegative) and 1 other source.

How this is worked out

4 steps
  1. Rounding 1234.567 to 3 decimal places using "round half away from zero".
  2. The rounding step is 0.001, so the neighbours are 1234.567 and 1234.567.
  3. 1234.567 / 0.001 = 1234567, which the rule sends to 1234567.
  4. 1234567 x 0.001 = 1234.567

Results are general information, not financial, tax, legal, medical or engineering advice.