Math
Rounding Calculator
Round numbers up, down, or to nearest.
Result
3.14
Rounded nearest to 2 decimals
Nearest integer
3
Truncated
3
Download results
Quick summary
Round any number to a chosen number of decimal places using nearest, ceiling (up), or floor (down) modes.
How to calculate rounding manually
- Enter your input values into the Rounding calculator above.
- Review the formula and assumptions in the Expert Guide section.
- Adjust the inputs to model different scenarios in real time.
- Save or export the results once they match your scenario.
Round any number to a chosen number of decimal places using nearest, ceiling (up), or floor (down) modes.
How it works
Multiply by 10^d, apply round / ceil / floor, then divide back by 10^d.
Example
3.14159 to 2 decimals → 3.14 (nearest), 3.15 (up), 3.14 (down).
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