Our other sites:

How to take outside measurements using a vernier caliper?

Shop for Vernier Calipers

Wonkee Donkee says: 'When taking measurements, try not to touch the measuring faces of the caliper. Even the smallest amount of oil on your hands can affect the accuracy of your readings.'
Vernier calipers are most commonly used to measure outside dimensions such as width, length or diameter. These distances are measured using the outside measuring faces of the caliper, the lower jaws. Vernier calipers are most commonly used to measure outside dimensions such as width, length or diameter. These distances are measured using the outside measuring faces of the caliper, the lower jaws.
Step 1 Hold the object you are measuring in one hand, and tighten the lower jaws around the object by adjusting the thumb screw with your other hand.

Step 1 – Tighten jaws of caliper around object

Hold the object you are measuring in one hand, and tighten the lower jaws around the object by adjusting the thumb screw with your other hand.

Step 2 Ensure that the object being measured is lying straight in the jaws with the dimension being measured being parallel to the main body of the calipers.

Step 2 – Ensure object is lying straight in jaws

Ensure that the object being measured is lying straight in the jaws with the dimension being measured being parallel to the main body of the calipers.

Step 3 Turn the lock screw to tighten the jaws so that you can remove your object and take your reading. Step 4 Read the measured value (See How to Read a Vernier Caliper).

Step 3 – Turn lock screw

Turn the lock screw to tighten the jaws so that you can remove your object and take your reading.

Step 4 – Read measured value

Read the measured value. (See our pages: How to read a metric vernier caliper or How to read an imperial vernier caliper)