What this calculator does
Round a number to a selected number of significant figures.
How it works
The calculator evaluates rounded = round(value to n significant decimal digits). Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
2-
?value=NumberNumber · Required · Default: 12,345.6789
-
?significantFigures=Significant figuresNumber · Required · Default: 4
Outputs
4-
roundedRounded valueText · Primary output
-
numericRoundedNumeric rounded valueNumber
-
scientificNotationScientific notationText
-
roundingPlaceRounding place valueText
Inputs and results
The inputs are Number, Significant figures. Results include Rounded value, Numeric rounded value, Scientific notation, Rounding place value.