Rounding Calculator

Rounding swaps a number for a nearby one with fewer digits, and which neighbour you land on depends on the rule applied. The first tab takes a decimal place count and shows the value rounded half up, rounded down and rounded up together, so the gap between the three rules is visible at a glance. The second tab snaps a number to the nearest thousandth, tenth, ten, hundred or thousand instead. Both tabs accept negative numbers and values that already have fewer digits than you asked for.