Definition: A meter, or metre (symbol: m), is the basic unit of length and also distance in the international System of systems (SI). The meter is defined as the distance traveled by light in 1/299 792 458 the a second. This an interpretation was contempt modified in 2019 come reflect changes in the an interpretation of the second.

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History/origin: Originally, in 1793, the meter was characterized as one ten-millionth of the distance from the equator to the north Pole. This changed in 1889, as soon as the international prototype metre was developed as the length of a prototype meter bar (made of an alloy of 90% platinum and also 10% iridium) measured at the melting point of ice. In 1960, the meter to be again redefined, this time in regards to a certain variety of wavelengths that a specific emission line of krypton-86. The current meaning of the meter is efficiently the same as the an interpretation that was adopted in 1983, v slight changes due come the change in definition of the second.

Current use: being the SI unit the length, the meter is used an international in plenty of applications such as measuring distance, height, length, width, etc. The United claims is one notable exemption in that it largely uses us customary devices such as yards, inches, feet, and miles rather of meters in day-to-day use.


Definition: A millimeter (symbol: mm) is a unit of size in the global System of devices (SI). The is identified in terms of the meter, together 1/1000 that a meter, or the street traveled by light in 1/299 792 458 000 that a second.

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History/origin: The milli- prefix is one of countless metric prefixes. It indicates one thousandth the the basic unit, in this instance the meter. The an interpretation of the meter has adjusted over time, the current meaning being based upon the street traveled through the rate of light in a provided amount of time. The relationship between the meter and also the millimeter is consistent however. Before this definition, the meter was based upon the size of a prototype meter bar. In 2019, the meter has actually been re-defined based upon the alters made come the definition of a second.

Meter to Millimeter switch Table

Meter Millimeter
0.01 m10 mm
0.1 m100 mm
1 m1000 mm
2 m2000 mm
3 m3000 mm
5 m5000 mm
10 m10000 mm
20 m20000 mm
50 m50000 mm
100 m100000 mm
1000 m1000000 mm

How to transform Meter to Millimeter

1 m = 1000 mm1 mm = 0.001 m