Significant figures are __always__ used when a measurement is made and they
express the degree of uncertainty in both measurements and calculations. In
any measurement, the number of significant figures always includes one more
decimal place than that obtained from the __smallest__ calibration on the
measuring instrument. All the digits in a __measured__ number are called
significant figures with all but the right-most digit known for sure because
the right-most digit has been estimated.

Several rules can be used to determine the number of significant figures when the measurement contains at least one zero. However, a very simple technique called Dot Right, Go Right is much easier to remember:

- If the measurement is written with a decimal point, then start with the
__left-most__digit. Move to the right until you find the__first non-zero digit__. Count that digit and every digit to the right end of the value. - If the measurement does not contain a decimal point, do exactly the same thing in the opposite direction (right to left).

To use the converter, enter the measurement and click the **Convert** Button. Use
the **Clear** Button to clear the values.