Rounding Calculator
Round up, round down, exactly.
Rounding Calculator
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Calculated instantly
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What This Calculator Does
The Rounding Calculator rounds numbers to any specified number of decimal places. It handles standard rounding, rounding up, and rounding down.
How It Works
Enter the number and desired decimal places. Standard rounding: 0-4 rounds down, 5-9 rounds up.
Example
3.14159 rounded to 2 decimal places is 3.14. Rounded to 4 places is 3.1416.
Formula
round(x * 10^n) / 10^nReading the Results
Rounded
The number rounded to the specified number of decimal places.
Frequently Asked Questions
How does standard rounding work?
If the next digit is 5 or more, round up. Otherwise, round down.
What is rounding to significant figures?
Significant figures count meaningful digits. For example, 3.14159 to 4 significant figures is 3.142.
Why does rounding matter?
Rounding errors accumulate in calculations. Choosing the right precision prevents misleading results.