Rounding Calculator
Round numbers to decimal places, whole numbers, tens, hundreds or larger places. Compare ordinary nearest rounding with floor, ceiling and truncation methods and see the difference between the original and rounded values.
How to use the Rounding Calculator
- Enter the number to round.
- Choose a positive decimal-place count for digits after the decimal point or a negative value for tens, hundreds and larger places.
- Choose the rounding method.
- The value is scaled to the target place, rounded using the selected rule and scaled back.
- Review the rounded value and its difference from the original.
Examples
3266.528 to hundredths
Rounded to two decimal places using ordinary nearest rounding, 3266.528 becomes 3266.53.
Nearest ten
A decimal-place setting of -1 rounds to the nearest ten.
Floor versus ceiling
Floor moves toward negative infinity, while ceiling moves toward positive infinity.
Frequently asked questions
What does rounding to two decimal places mean?
It keeps two digits after the decimal point and uses the next digit to determine ordinary rounding.
How do I round to the nearest ten?
Use a decimal-place setting of -1. A setting of -2 rounds to the nearest hundred.
What is floor rounding?
Floor returns the greatest permitted rounded value that is less than or equal to the original value.
What is truncation?
Truncation removes digits beyond the selected place without applying ordinary rounding.
More math tools
Significant Figures Calculator
PopularCount significant figures and round numbers to a selected number of significant digits.
Open tool →Decimal to Fraction Calculator
PopularConvert decimals and repeating decimals to simplified fractions and mixed numbers.
Open tool →Scientific Calculator
PopularAdvanced calculator for trig, logs, roots, powers, factorials and more.
Open tool →Percentage Calculator
PopularCalculate percentages, increases and decreases.
Open tool →Pythagorean Theorem Calculator
PopularSolve a right triangle for a missing leg or hypotenuse.
Open tool →Ratio Calculator
PopularSimplify ratios and find equivalent ratios.
Open tool →