About this tool
Round a number to decimal places or to the nearest multiple, with five rounding rules.
The number is divided by the rounding unit (10⁻ᵈ or the multiple), rounded with the chosen rule, then multiplied back. Half-even (banker’s rounding) sends .5 to the nearest even digit.
Formula: round(x / u) × u
Example: Number = 3.1416, Round to = Decimal places, Decimal places = 2, Rule = Half up (standard) → Rounded value = 3.14.
Computers store most decimals approximately, so results are corrected for tiny floating-point errors.
Quick steps
- Enter your values — every field shows its unit.
- Press Calculate (or Try an example to see how it works).
- Read the results and copy them if you need them elsewhere.
The calculation runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Rounding Calculator work?
The number is divided by the rounding unit (10⁻ᵈ or the multiple), rounded with the chosen rule, then multiplied back. Half-even (banker’s rounding) sends .5 to the nearest even digit.
What should I keep in mind?
Computers store most decimals approximately, so results are corrected for tiny floating-point errors.
Is my data sent anywhere?
No. The numbers stay on your device; the page only shows the result.