What is the scale on the tape measure?

The numbers on the tape measure are divided into two lines, one in centimeters/centimeters and the other in inches.

1 cm is about 0.3937 inch, and 1 inch is about 2.54 cm, so the shorter number unit between the two numbers is cm and the longer number unit is inch. The number font in centimeters is also smaller than that in inches, 100 cm = 1 m, and the common unit is centimeters.

Extended data:

1, measurement method

The tape head is loose, so that we can measure the size. There are two ways to measure dimensions with a tape measure. One is hanging on the object, and the other is propping on the object. The difference between these two methods lies in the thickness of the iron sheet at the head of the tape measure. The purpose of loosening the tape head is to compensate the iron sheet at the tape head when the tape head abuts against the object.

2. Stress of tape measure

There is a small piece of steel inside the "inner core" of the tape measure, which acts like a spring. There is a folded part in front of the tape measure, which works at this time, so that the tape measure is stuck outside, so that it will not be completely retracted. At first, he was loose, but after pulling it out, he became very tight. After letting go, it should have a recovery process, so it will bounce back automatically.

References:

Baidu encyclopedia-tape measure