Ruler is a traditional unit of length, which is usually used in Asian countries, such as China, Japanese and Korean. In China, the ruler is one of the traditional units of length in China. 1 ruler equals 10 inch, and 1 inch equals 10 minute. Centimeter is an international unit of length, which is often used around the world. 1 cm is equal to 1% of 1 m. Compared with ruler, centimeter is a smaller unit, which can measure shorter length more accurately.

There is a fixed conversion relationship between ruler and metric unit. Therefore, if you need to convert feet into centimeters, you can use the conversion ratio of about 30.33 centimeters per foot for calculation. For example, if there is an object with a length of 3 feet, it can be converted into centimeters, that is, 3 feet times 30.33=90.99 centimeters.

Other commonly used units of length:

1, decimeter: decimeter is a unit in the international system of units and is represented by the symbol "dm". Decimeter is a smaller unit of meter, slightly larger than meter and slightly smaller than centimeter. In the international system of units, 1 decimeter is equal to 0. 1 meter, that is, 1 decimeter is equal to 10 cm.

2. Millimeter: millimeter, also known as millimeter, is a unit of length and a unit of rainfall, abbreviated as mm in English. 1 mm is equivalent to one thousandth of 1 m.

3. Micron: Micron is the unit of length, and 1 micron is equivalent to one thousandth of 1 millimeter.

4. Nanometer: Nanometer, which is a unit of measurement for length. 1 nanometer = 10 minus 9 meters. Much smaller than the length of a single bacterium. At present, the micro-scale of many materials is mostly in nanometers. For example, most semiconductor process standards are expressed in nanometers.

5. Kilometers: Kilometers is a unit of length, commonly known as kilometers, which is expressed in English as km. Equal to 1000 meter.

Reference to the above content: Baidu Encyclopedia-ruler

Reference to the above content: Baidu Encyclopedia-cm