The decimeter is one of the metric units of length, and 1 decimeter is equivalent to one tenth of 1 meter. Ten centimeters equals one decimeter, and ten meters equals one meter. "meter" (meter), the basic unit of length in the international system of units, with the symbol M, can be used to measure length, width and height. From 1983, the length of meter is defined as "the distance that light travels in vacuum in 1/299 792 458 seconds".

The definition of "meter" originated in France. The length of 1 meter was originally defined as one ten thousandth of the distance from the equator of the earth to the north pole on the meridian passing through Paris, and then the international meter origin was determined. With the deepening of people's understanding of measurement, the definition of the length of meter has been revised several times.

Length unit:

Its international unit is "meter" (symbol "m"), and commonly used units are millimeter (mm), centimeter (cm), decimeter (dm), kilometer (km), meter (m), micron (micron) and nanometer (nm). The length of 1 meter was originally defined as one ten thousandth of the distance from the equator of the earth to the north pole on the meridian passing through Paris, and then the international meter origin was determined.

Length conversion:

1 km =1000m.

1 m = 100 cm。

1 cm = 10/0mm.

Reference to the above content: Baidu Encyclopedia-Mi