メジャー（巻尺）の目盛りの読み方
線の長さで見分けます：一番長い線がインチ、次に長いのが1/2インチ、その次が1/4、1/8、一番短い線が1/16インチです。
メジャー（巻尺）の目盛りの読み方 — Step-by-Step Reference
インチ巻尺の読み方を完全解説。1/16、1/8、1/4、1/2の目盛り線の見分け方とミリ換算表。
US Imperial Standard
Standard fractions divided into 1/16", 1/8", 1/4", and 1/2" increments with exact decimal benchmarks.
Metric SI Equivalence
Millimeter and centimeter precision calculated using exact 25.40 mm per international inch conversion.
メジャー（巻尺）の目盛りの読み方 FAQ
What does each line on a tape measure mean?
Each line marks a fraction of an inch. The longest line with a number is a whole inch, the next longest is 1/2 inch, then 1/4 inch, 1/8 inch, and the shortest lines are 1/16 inch (see our 5/16 guide and 5/8 guide).
How many lines are in one inch on a tape measure?
Most standard tape measures divide each inch into 16 equal spaces, so there are 15 small lines between two inch numbers.
Which lines on a tape measure represent inches?
The longest lines, which are numbered 1, 2, 3 and so on, represent whole inches.
How do I read a tape measure for beginners?
Find the last whole inch number before your mark, count the small lines after it, and write that as a fraction out of 16. Then reduce it: for example 6 lines is 6/16, which reduces to 3/8. Use the interactive practice tool above to check yourself.
How do I read the beginning of a tape measure?
Hook the end on the object and read from the zero. The metal hook is slightly loose on purpose, so it slides by its own thickness to give an accurate inside or outside reading. For extra accuracy, start at the 1 inch mark and subtract 1 inch from the final reading.
How do I read measurements like 3 and 7/16 inches?
Find the 3 inch mark, then count 7 of the shortest lines past it. Use the live fraction, decimal and millimeter converter above to double-check.