Rounding Calculator
Round a number to a chosen number of decimal places.
Worth Knowing
Rounding to a chosen number of decimal places follows the round-half-up convention most people learned in school, though statisticians often prefer 'round half to even' (banker's rounding) to avoid a slight upward bias when rounding many numbers. The hidden danger is compounding: rounding intermediate steps and then combining them can drift noticeably from rounding only the final answer, so it's best to carry full precision through a calculation and round once at the end.
How to Use
- Enter Number into the first field of the Rounding Calculator.
- Fill in the rest: Decimal places.
- Your result appears instantly as you type — there's no submit button or page reload.