Math Calculators
Rounding Calculator
Round a number to any number of places.
Free account14-day Pro trialWorks in your browser
Sign in to use this tool
Create a free account to unlock every tool — plus a 14-day free trial of HQ Pro, no card required.
About the Rounding Calculator
Round a number cleanly to the precision you need. Enter a number and the number of decimal places and the calculator returns the rounded value, plus the nearest whole number. It uses standard round-half-up rounding — handy for money, measurements, and tidying up results.
How to use the Rounding Calculator
- 01Enter your a number and the decimal places.
- 02Read the result instantly — it recalculates as you type.
- 03Adjust the numbers to model different scenarios.
Frequently asked questions
How does rounding work?
Digits at or above 5 in the next place round up; below 5 round down. This tool rounds to your chosen number of decimal places.
Can I round to the nearest 10 or 100?
This tool rounds to decimal places and the nearest integer. For tens/hundreds, round then adjust, or use the significant-figures approach.