How to use this calculator

Rounding replaces a number with a nearby value at the requested decimal precision.

The method

Rounded = round(value × 10^places) / 10^places

Enter your values in the labeled fields and choose Calculate. The result panel shows the answer and supporting values when useful.

WORKED EXAMPLE INPUT

Number: 12.34567, Decimal places: 2

Select Calculate to evaluate these example values.

Scope and limitations

Uses standard JavaScript half-toward-positive-infinity rounding behavior for exact halfway binary-representable cases. Uses real-number arithmetic and rounds display values without changing the entered inputs. Check important results independently.

Common questions

Can I use different units?

Use consistent units unless this page is a unit converter. The result follows the units implied by the inputs.

Are results exact?

Displayed values may be rounded. Keep extra precision for important follow-up calculations.

Methods & verification

Formulas use standard mathematical definitions and fixed unit factors where applicable. See our methodology for numerical conventions, rounding, privacy, and limitations.