Rounding Calculator
Round a number to a chosen number of decimal places or significant figures.
How to use this calculator
Enter the requested values, then select Calculate. Results are processed locally in your browser for this static website.
Accuracy notes
Results may be affected by rounding, unit conventions and the assumptions shown by the calculator. Verify important calculations independently.
What this calculator solves
Round a number to a chosen number of decimal places or significant figures. This page provides the interactive calculation together with a plain-language explanation so the result can be checked against the underlying method.
Science and formulae
Decimal-place rounding keeps the selected place and adjusts the retained value according to the next digit; significant-figure rounding follows the same principle from the first nonzero digit.
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