SumHexa — Calculate anything.

Number rounding

Round a decimal number with an explicit precision and rule.

Both dots and commas are accepted as decimal separators. Nearest ties round away from zero: 1.005 → 1.01 and −1.005 → −1.01 at two places. Toward −∞: −1.21 → −1.3 at one place; toward zero: −1.21 → −1.2. Trailing zeros show the selected precision.

Both dots and commas are accepted as decimal separators.

Your inputs stay in your browser.

Method and assumptions

Method version 1.0.0 · Updated

Round to a precision

Formula: Decimal rounding to p places according to the selected rule

Both dots and commas are accepted as decimal separators. Nearest ties round away from zero: 1.005 → 1.01 and −1.005 → −1.01 at two places. Toward −∞: −1.21 → −1.3 at one place; toward zero: −1.21 → −1.2. Trailing zeros show the selected precision.

value
Number to round
places
Decimal places
mode
Rounding rule

Exact decimal input of at most 80 characters, including sign and separator; 0 to 12 decimal places in the result. Trailing zeros are preserved. No second display rounding.

Calculate with code

These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.

JavaScript
console.log(Number((12.3456).toFixed(2))); // 12.35
TypeScript
const rounded = Number((12.3456).toFixed(2));
console.log(rounded); // 12.35
Python
print(round(12.3456, 2))  # 12.35
Java
System.out.println(new java.math.BigDecimal("12.3456").setScale(2, java.math.RoundingMode.HALF_UP)); // 12.35
C#
Console.WriteLine(Math.Round(12.3456, 2, MidpointRounding.AwayFromZero)); // 12.35