Rounding Calculator
Round a number to a fixed number of decimal places, or to the nearest multiple of any amount — to the nearest value, always up, or always down.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Your result
372.46
Rounded result
AI explanation
Formula
Scales the number, rounds to an integer using the chosen direction, then scales backWorked example
3.14159 rounded to 2 decimal places
| Field | Value |
|---|---|
| Number | 3.14159 |
| Round to | decimal-places |
| Amount | 2 |
| Direction | nearest |
| Rounded result | 3.14 |
Assumptions
- The "nearest" direction rounds a .5 case away from zero (the everyday-calculator convention, e.g. 2.5 rounds to 3 and -2.5 rounds to -3).
- For decimal places mode, the amount must be a whole number from 0 to 15.
- For nearest-multiple mode, the amount must be greater than 0.
Frequently asked questions
What's the difference between rounding to decimal places and rounding to the nearest multiple?
Rounding to decimal places controls precision (like 3.14159 → 3.14). Rounding to the nearest multiple snaps a number to a specific step size (like rounding 372 to the nearest 50, giving 350) — useful for prices, quantities, or estimates.
How does "always round up" differ from normal rounding?
Normal ("nearest") rounding goes to whichever side is closer. "Always round up" (ceiling) always rounds to the next value in the upward direction, even if the number is very close to the lower one — useful when you need to guarantee enough of something (like packaging or material quantities).
How do I round to the nearest 10 or 100?
Choose "nearest multiple of a number" mode and enter 10 or 100 as the amount.