EachCalculatorRounding Calculator
Round any number to a specific number of decimal places, or to the nearest multiple of any value.
Round to
Direction
Result
3.14
How It Works
Rounding to decimal places
The number is scaled up by a power of 10 matching the desired decimal places, rounded to the nearest whole number, then scaled back down.
Rounding to a multiple
To round to the nearest multiple of a number (like the nearest 5 or nearest 50), the value is divided by that multiple, rounded, then multiplied back.
Example Calculation
3.14159 rounded to 2 decimal places is 3.14. 23 rounded to the nearest multiple of 5 is 25.
Common Mistakes
- Rounding a value that's already been rounded once — this can compound small errors across multiple steps.
- Confusing 'round to nearest' with always rounding up or always rounding down — these give different results for the same number.
Frequently Asked Questions
- What's the difference between rounding up, down, and to the nearest value?
- Rounding up (ceiling) always increases to the next value, rounding down (floor) always decreases, and rounding to the nearest picks whichever is closer — most everyday rounding uses 'nearest.'
- How do I round to the nearest 10, 100, or other multiple?
- Use the 'round to nearest multiple' mode and enter the multiple you want — this works for any multiple, not just powers of 10.