Rounding Calculator

Round numbers to any decimal place, significant figures, or to the nearest integer, ten, hundred, etc.

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Fill in your values above and click Calculate.

Frequently Asked Questions

Q.What are the rounding rules?

If the digit to be dropped is less than 5, round down. If 5 or more, round up. Example: 3.145 rounded to 2 decimal places = 3.15.

Q.What are significant figures?

Significant figures are all meaningful digits in a number. 3.14 has 3 significant figures. 100 has 1 (or 3 if written as 100.).