Math
Rounding Calculator
Round a number to a chosen number of decimal places.
Formula
Look at the digit after the last kept place: 5 or more rounds the kept digit up, less than 5 leaves it unchanged.
How it works
Enter a number and how many decimal places to keep. The calculator rounds using the usual half-up rule shown by toFixed.
FAQs
What does the Rounding do?
It takes the values you enter and works out the rounding for you, showing the result straight away.
What should I enter?
Enter ordinary numbers in the boxes above. If a value does not make sense for this calculation, the page will ask you to check it instead of showing a wrong answer.
Can I use the result for homework or everyday maths?
Yes. It is a general-purpose maths helper; for exam or professional work, still check the steps against your own working.