Round a number to a chosen place, with rounding up and down shown alongside. Enter the number and the place.
Usage Tip
For money, round to two decimals; for quick estimates, rounding to a leading digit or two keeps mental math easy.
Halves round up to the nearest
Round half up is the common convention; some fields use round half to even (bankers rounding).
Rounding down (floor) and up (ceiling) are also shown.
Repeated rounding at different places can drift, so round once from the original value.
Rounding replaces a number with a nearby value that has fewer digits. To round to a given place, look at the digit just to the right: if it is 5 or more, round up, and if it is 4 or less, round down. Rounding 3.14159 to two decimal places gives 3.14, while rounding 2,456 to the nearest hundred gives 2,500.
Rounding up and rounding down show the nearest values on either side, which is useful for estimates where you need a minimum or a maximum, such as how many boxes to order. Rounding too early in a multi-step calculation lets errors build up, so keep full precision until the final answer. Negative numbers and values exactly halfway can be handled in different ways, so check which convention your field uses.