Check the unit scale on the beam
Identify the main beam reading
Read the value at the zero line of the dial pointer
Count the dial divisions from zero to the pointer
Add the dial reading to the main beam reading
Include any fractional value shown by the dial
Verify whether the caliper is in inches or millimeters
Read the vernier scale if your caliper has one
Close the jaws to confirm the zero setting before measuring
Record the final measurement using the correct unit