Significant Figures Calculator

Our Significant Figures Calculator helps you determine the precision of a number and round it correctly. Here's how to use it:

Step 1: Enter a number into the 'Number' field.

Step 2: If you want to round the number to a specific precision, enter the desired number of significant figures in the 'Round to' field.

Step 3: Click 'Calculate' to see the count of significant figures, the rounded result, and a breakdown of the rules applied to your input.

Significant figures (sig figs) are the digits in a number that carry meaningful information about its precision. The rules are:

1. All non-zero digits are significant. 2. Zeros between non-zero digits (captive zeros) are significant. 3. Leading zeros are never significant. 4. Trailing zeros are significant only if the number contains a decimal point. 5. Trailing zeros in an integer without a decimal point are generally not significant unless indicated otherwise.