Rounding Calculator
Round any number to a specified number of decimal places
About this calculator
Rounding reduces the precision of a number while keeping it close to the original. Round to 2 decimal places: multiply by 100, round to nearest integer, divide by 100. π ≈ 3.14159 rounded to 2 places = 3.14. Rounding is essential in finance (to cents), science (significant figures), and everyday reporting.
How to use
Round 7.4567 to 2 decimal places → 7.46. Round 1234.5 to 0 decimal places → 1235. Round 0.00456 to 4 decimal places → 0.0046.
Frequently asked questions
What is banker's rounding?
Standard rounding always rounds 0.5 up. Banker's rounding rounds 0.5 to the nearest even number: 2.5 → 2, 3.5 → 4. This reduces cumulative rounding errors in financial calculations and is used in many programming languages.
What is the difference between rounding and truncating?
Rounding finds the nearest value. Truncating simply drops digits. 3.99 rounded to 0 places = 4, but truncated = 3.