Vernier calliper least count

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Vernier calliper least count is the smallest measurement that can be read on the instrument.

It is the difference between the smallest division on the main scale and the smallest division on the vernier scale.
It is usually 0.1 mm or 0.02 mm for metric vernier callipers and 0.001 inch for imperial vernier callipers.
The least count determines the precision of the instrument and affects the accuracy of the measurements taken.
To measure an object, the jaws of the vernier calliper are placed around the object and the reading is taken by aligning the zero on the main scale with the zero on the vernier scale and reading the measurement on the scale where the lines match up.

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