Rounding Calculator
Round numbers to any decimal place with visual representation
Input Number
2
0 5 10
Results
Enter a number and select decimal places to see the result
Visual Representation
Number Line
How Rounding Works
Rounding means reducing the digits in a number while trying to keep its value similar. The result is less precise but easier to use.
The most common method is round half up, where:
- If the digit to the right is < 5, round down
- If the digit to the right is ≥ 5, round up
Example:
Rounding 3.14159 to 2 decimal places:
Look at the 3rd decimal digit → 1
Since 1 < 5, we don't round up
So 3.14159 becomes 3.14
Another Example:
Rounding 2.678 to 2 decimal places:
Look at the 3rd decimal digit → 8
Since 8 ≥ 5, we round up
So 2.678 becomes 2.68