Rounding Calculator
Round a number to decimal places or to the nearest ten/hundred/thousand.
Tip: See the rounding down (floor) and up (ceil) next to the standard one.
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About this digital tool
The rounding calculator brings a number to the precision you need: a whole number, one to three decimal places, or the nearest ten, hundred or thousand. Besides standard rounding, it also shows the value rounded down (floor) and up (ceil).
The standard rule is: if the digit after the chosen place is 5 or more, the remaining digit goes up, otherwise it stays the same. For example, 3.14159 to two decimal places becomes 3.14, while 2745 to the nearest hundred becomes 2700. For negative numbers, floor goes toward the smaller value and ceil toward the larger: −2.3 gives −3 down and −2 up. It is used for prices, measurements, reports and school homework.
How to use
- Enter the number.
- Choose how far to round.
- See the standard, down and up values.
Frequently asked questions
How is 0.5 rounded?
Standard rounding (half up) is used: 2.5 → 3. For 'down' use floor and for 'up' use ceil.
How do I round a number to two decimal places?
Look at the third digit after the point: if it is 5 or more, add 1 to the second digit. E.g. 2.678 becomes 2.68, while 3.14159 becomes 3.14.
What is 1250 rounded to the nearest thousand?
It is 1000, because 250 is less than 500. To the nearest hundred, 1250 gives 1300 (half-up rule), and to the nearest ten it gives 1250.
What is the difference between floor and ceil for negative numbers?
Floor gives the largest whole number less than or equal to the number, ceil the smallest greater than or equal. For −2.3 floor is −3 and ceil is −2.