Digital calipers are available with both an inch and metric scale. In the event one is encountered in metric only, a simple mathematical conversion is necessary to convert it to inches. Digital calipers are more accurate than dial calipers because no interpolation is necessary for the last hundred thousandths. Dial calipers use a needle so when the needle falls between increment marks, judge the distance between the increments to arrive at an approximate number. Digital calipers on the other hand, display the entire number with no guess work.
- Close the jaws of the caliper completely and press the 0 button under the digital screen.
- Read the slider scale by looking for the last whole number that can be seen at the marker line to the right of the lower jaw.