Quick guide
How to use this calculator
- Enter the value and positive multiple.
- Choose the rounding rule.
- Read the chosen multiple, step count, and exact distance moved.
Calculation method
Round the exact step count
The value is divided by the step as an exact rational. That quotient is rounded to an integer under the selected rule, then multiplied by the original step.
Worked example
Nearest multiple of 2.5
17.6 is nearer to seven steps (17.5) than eight steps (20).
17.6 → 7 × 2.5 = 17.5
Supported inputs
Precision and limits
Exact decimal input
Finite decimals use integer-scaled arithmetic, with no binary floating-point conversion.
Input boundary
Unless stated otherwise, use at most 200 digits total and 100 digits after the decimal marker.
Positive step
The multiple must be greater than zero.