Rounding calculator

Half up: round to the nearest; exact halves go away from zero. Half even: exact halves go to the even neighbour. Up: towards +∞. Down: towards −∞. Truncate: towards zero. Choose how many decimal places to keep; use a negative number to round to tens (−1), hundreds (−2) or thousands (−3). The calculator rounds the decimal number you type, not its binary approximation, so 1.005 rounded to two places is 1.01, as you would do by hand. Banker's rounding sends exact halves to the even digit, which avoids an upward bias when many values are added up.

With number 2.675, decimal places 2, rounding method Nearest, halves away from zero, the rounded value is 2.68. Change from the original: 0.005.

This is an estimate based on the inputs and assumptions shown on this page, not professional advice. Check anything with financial, health or safety consequences independently.

Yes. Calculations run in your browser and your numbers are not sent to a server. A share link contains the inputs you choose to share, so check it before sending it to anyone.

Many programs store 2.675 in binary as 2.67499999…, which rounds down. This calculator rounds the decimal value you typed, so the half rounds up as taught in school.

Halves go to the nearest even digit: 2.5 becomes 2 and 3.5 becomes 4. Over many values, halves round up and down equally often, so totals are not pushed upwards. It is the default in IEEE 754 arithmetic and in some accounting and statistics work.

Set decimal places to −3. For example 1,234,567 becomes 1,235,000.