Rounding Calculator

Round a number to a chosen number of decimal places.

Rounding Calculator helps you round a number to a chosen number of decimal places. Enter value and decimal places, review the breakdown, and use the guidance below to understand what the number means — and what it does not. What the Rounding calculator does Rounding Calculator is built for arithmetic, algebra, geometry, and number tools. Round a number to a chosen number of decimal places. You enter value and decimal places, then Simple Calculators computes the result instantly. Results use standard school and engineering formulas that run privately in your browser. How the math works Enter the Value and the number of Decimal places to keep (a whole number from 0 to 12; 0 gives a whole number). The calculator looks at the first digit after the last place you are keeping, exactly as you typed it: 5 or more rounds up, 4 or less rounds down, so 1.005 to 2 places gives 1.01. Negative numbers round the same way by size, so −2.5 becomes −3. It also shows the result of always rounding down (floor), always rounding up (ceiling), simply cutting off the extra digits (truncating) and banker’s rounding, where a 5 goes to the nearest even digit. The formula: Look at the next digit: 5 or more ro…