Math · Arithmetic

Rounding Calculator

Round any number to the nearest whole number, tenth, hundredth, thousandth or any custom decimal place — with the exact rule applied.

Number to round

Decimal places

Rounded value

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Rounding rule: look at the digit immediately to the right of the target place. If it is 5 or more, round up; otherwise round down.
Example: 3.14159 to 2 dp → digit 1 (the third decimal) < 5 → 3.14.

Any precision

From hundreds down to 6 decimal places, or pick a custom place.

Half-up rule

Standard rounding: .5 and above rounds away from zero.

Negative numbers

Correct rounding for negatives with the away-from-zero rule.

Step explained

Shows exactly which digit was inspected and why.

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