Rounding Calculator

Use this rounding calculator when you need a fast and consistent way to simplify numbers without doing each step by hand. It can round to decimal places, whole numbers, tens, hundreds, thousands, or a custom increment, which is useful for math practice, reporting, prices, measurements, and spreadsheet reviews.

Enter the value, choose the rounding mode, and select the output scale you need. You can round to the nearest value, always round up, always round down, or truncate extra digits. The tool also shows the difference between the original number and the rounded result.

In nearest mode, midpoint values such as 2.5 and -2.5 follow a symmetric away-from-zero rule. That keeps the behavior predictable for both positive and negative numbers.