Definition:Metric System/Length
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Definition
Various metric units of length which have specific names are as follows:
Micrometre
The micrometre is a metric unit of length.
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | micrometre | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 10^{-3}\) | millimetre | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 10^{-6}\) | metres |
Millimetre
The millimetre is a metric unit of length.
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | millimetre | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 1000\) | micrometres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 10^{-3}\) | metres |
Centimetre
The centimetre is the CGS base unit of length.
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | centimetre | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 10\) | millimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 10 \, 000\) | microns | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 0 \cdotp 01\) | metres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 0.3937\) | inches |
Decimetre
The decimetre is a metric unit of length.
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | decimetre | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 10\) | centimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 100\) | millimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 0 \cdotp 1\) | metres |
Metre
The metre is the SI base unit of length.
It is defined as the distance travelled by light in vacuum in $\dfrac 1 {299 \ 792 \ 458}$ of a second.
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | metre | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 100\) | centimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 1000\) | millimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 10 \, 000\) | microns | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 39.3708\) | inches | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 3.28\) | feet | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 1.09\) | yards |
Hectometre
The hectometre is a metric unit of length.
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | hectometre | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 100\) | metres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 10 \, 000\) | centimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 100 \, 000\) | millimetres |
Kilometre
The kilometre is a metric unit of length.
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | kilometre | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 1000\) | metres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 100 \, 000\) | centimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 10^6\) | millimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 39 \, 370 \cdotp 4\) | inches | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 0.621\) | miles |