Rounding Calculator
The Rounding Calculator rounds numbers to the nearest whole number, decimal place, ten or hundred.
Rounding Calculator
What the result means
The result shows the number rounded to the selected precision.
How to use this calculator
- 1Enter the number.
- 2Select the precision.
- 3Press Calculate.
The formula
The calculation uses a standard, verifiable formula. Here it is in its simplest form.
Rounded = round(N × 10^p) / 10^p
What each variable means
| Symbol | Name | Description |
|---|---|---|
| N | Number | The number to round. |
| p | Precision | Number of decimal places. |
Step-by-step example
Example: 3.14159 to 2 decimals
Number:3.14159Precision:2
- 13.14159 × 100 = 314.159
- 2round(314.159) = 314
- 3314 / 100 = 3.14
Result
3.14
What changes the result
- Rounding rules follow standard mathematical rounding.
Edge cases to be aware of
Unusual situations handled correctly
- Negative numbers round away from zero.
Common mistakes
Avoid these errors
- Confusing rounding with truncation.
Assumptions
- Standard rounding rules apply.
Limitations
- Does not support significant figures.
Frequently asked questions
What is the difference between rounding and truncation?+
Rounding finds the nearest value. Truncation simply cuts off extra digits without rounding.