Round a number to a chosen number of significant figures, and count those in the original. Enter the number and how many sig figs.
Rounded
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To the chosen sig figs.Usage Tip
In calculations, the result should carry no more significant figures than the least precise input.
THE MATH
Significant figures are all digits except leading zeros
Rounding keeps the most significant ones
Rounding keeps the most significant ones
Significant figures express the precision of a measurement.
Leading zeros never count; trailing zeros after a decimal point do.
Leading zeros never count; trailing zeros after a decimal point do.
Enter a number and the number of significant figures to keep.
The original significant-figure count is also shown.
Trailing zeros in whole numbers are treated as not significant here.
The original significant-figure count is also shown.
Trailing zeros in whole numbers are treated as not significant here.