Rounding Calculator
Round numbers using various methods. Supports decimal places, round half up/down, ceil, floor, and banker's rounding.
Input
Enter a number to round.
Rounding Methods Explained
Round Half Up
Rounds up when the fractional part is >= 0.5, otherwise rounds down. The most common rounding method.
Example: 2.5 → 3, 2.4 → 2, -2.5 → -3
Round Half Even (Banker's)
When exactly halfway (0.5), rounds to the nearest even number. Reduces statistical bias. (Banker's rounding)
Example: 2.5 → 2, 3.5 → 4, 2.4 → 2
Round Half Down
Rounds up only when the fractional part is > 0.5, otherwise rounds down.
Example: 2.5 → 2, 2.6 → 3, 2.4 → 2
Round Up (Ceil)
Always rounds up towards positive infinity.
Example: 2.1 → 3, 2.9 → 3, -2.1 → -2
Round Down (Floor)
Always rounds down towards negative infinity.
Example: 2.1 → 2, 2.9 → 2, -2.1 → -3
All calculations are performed in your browser. No data is sent to any server.