How to read a metric dial caliper

Step 1 – Look at the main scale

When taking measurements, you should first read the value on the main scale.

This will be the number immediately to the left of the reference edge.

On a metric dial caliper, this will be given in millimetres (mm). Each increment on the scale is equal to 1mm.

Step 2 – Look at dial indicator

Next, read the value shown on the dial indicator.

On most metric dials each increment is equal to 0.02mm.

Step 3 – Add the two values together

To get your total reading, add the two values together.

In this example, the caliper is showing a reading of 15.43mm.

15mm (shown on the beam scale) + .43mm (shown on the dial scale) = 15.43mm.