Start at the hook end and align it with the edge of the object
Read the largest numbered mark for inches or centimeters
Count the smaller marks between the numbers
Identify fractions of an inch by the mark length
Use the longest small mark for 1/2
Use the next longest marks for 1/4 and 3/4
Use shorter marks for 1/8, 3/8, 5/8, and 7/8
Use the smallest marks for 1/16 if present
For metric tape measures, read millimeters and centimeters
Count every 10 millimeters as 1 centimeter
Check the tape direction before recording the measurement
Keep the tape straight for accurate reading
Note the measurement at the exact edge of the object