Vernier Caliper

What is a Vernier Caliper?

A vernier caliper is a measuring device used to precisely measure linear dimensions. In other words, it measures a straight line between two points.

However, it is also a very useful tool to use when measuring the diameter of a round objects like cylinders because the measuring jaws can be secured on either side of the circumference.

Vernier calipers are super useful and a great tool to have in the tool box. We’ve put our heads together and created our top picks for vernier calipers:

How To Read A Vernier Caliper

A quick guide on how to read a vernier caliper. A vernier caliper outputs measurement readings in centimetres (cm) and it is precise up to 2 decimal places (E.g. 1.23 cm).

Note: The measurement-reading technique described in this post will be similar for vernier calipers which output measurement readings in inches.

Measurement Reading Technique For Vernier Caliper

In order to read the measurement readings from vernier caliper properly, you need to remember two things before we start. For example, if a vernier caliper output a measurement reading of 2.13 cm, this means that:

  • The main scale contributes the main number(s) and one decimal place to the reading (E.g. 2.1 cm, whereby 2 is the main number and 0.1 is the one decimal place number)
  • The vernier scale contributes the second decimal place to the reading (E.g. 0.03 cm)
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