There are 50 divisions of .01mm on the thimble of a metric micrometer.

**And here's how you calculate the least count of a micrometer:**

The formula you need is Least Count (L. C) = Pith/no. Of divisions on micrometer barrel(thimble)

where, Pith = distance travelled by thimble on linear sacle in one rotation.

where, Pith = distance travelled by thimble on linear sacle in one rotation.

Remember! The barrel/thimble of the micrometer will be divided into increments of .01 mm (millimeters).