Check the unit marked on the micrometer
Identify the sleeve or main scale
Read the last visible whole unit on the sleeve
Check the thimble scale line aligned with the sleeve reference line
Add the sleeve reading and thimble reading
Include the vernier reading if the micrometer has a vernier scale
Use the ratchet or friction thimble for consistent measurement
Verify the measurement is within the micrometer’s range
Record the final value in the correct unit