Rounding calculator
Round decimals, whole numbers, tens or hundreds. Choose precision and see how halfway values and negative numbers are rounded.
How to use this page
- Enter your data or use the example.
- Choose the method or precision and press Calculate.
- Review the result, explanation and details; you can copy the calculation.
What this page does not do: Decimal rounding from the exact input text, up to 100 input digits. This differs from choosing significant figures. It does not use bankers rounding (ties to even).
Further reading
If the first discarded digit is below 5, keep the last retained digit. At 5 or above, increase the absolute value. Halfway values round away from zero: 1.005 to two decimal places becomes 1.01; −1.005 becomes −1.01. To the nearest hundred, 1250 becomes 1300. Trailing zeros show the chosen precision.
Frequently asked questions
How do I read the result?
If the first discarded digit is below 5, keep the last retained digit. At 5 or above, increase the absolute value. Halfway values round away from zero: 1.005 to two decimal places becomes 1.01; −1.005 becomes −1.01. To the nearest hundred, 1250 becomes 1300. Trailing zeros show the chosen precision.
What are the limitations?
Decimal rounding from the exact input text, up to 100 input digits. This differs from choosing significant figures. It does not use bankers rounding (ties to even).
See also
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Enter numbers separated by commas and calculate the arithmetic mean online. The calculator will give you the s
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