# How do you define least count for Vernier Calipers?

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Hint: The least count, as the name suggest is the least value that can be counted using an instrument and same goes for the Vernier Callipers in which the least count can be calculated based on the size of smallest division on the main scale and number of divisions on the Vernier scale.

Least count = $\dfrac{\text{Smallest reading on main scale}}{\text{Number of divisions on Vernier scale}}=\dfrac{1mm}{10}$ = This is the least count for Vernier Callipers.