How to use and read a vernier caliper correctly?
Vernier calipers are based on the difference of two scale moving relative to each other. Let me know the unit of measurement on your vernier caliper and I will demonstrate how you would take a reading from it. In General the total units on the main scale BEFORE THE ZERO ON THE VERNIER SCALE must be read then on to this is added the subdiviion number where the vernier scale lines up exactly with the main scale subdivision.