Definition:Metric System/Length
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Definition
Various metric units of length which have specific names are as follows:
Angstrom
The angstrom is a metric unit of length.
| \(\ds \) | \(\) | \(\ds 1\) | angstrom | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-1}\) | nanometres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-4}\) | micrometres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-7}\) | millimetres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-8}\) | centimetres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-10}\) | metres |
Nanometre
The nanometre is a metric unit of length.
| \(\ds \) | \(\) | \(\ds 1\) | nanometre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10\) | angstroms | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-3}\) | micrometre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-6}\) | millimetre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-9}\) | metres |
Micrometre
The micrometre is a metric unit of length.
| \(\ds \) | \(\) | \(\ds 1\) | micrometre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-3}\) | millimetre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-6}\) | metres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 39 \cdotp 3708\) | microinches |
Millimetre
The millimetre is a metric unit of length.
| \(\ds \) | \(\) | \(\ds 1\) | millimetre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 1 \, 000 \, 000\) | nanometres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 1000\) | micrometres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-3}\) | metres |
Centimetre
The centimetre is the CGS base unit of length.
| \(\ds \) | \(\) | \(\ds 1\) | centimetre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10\) | millimetres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10 \, 000\) | micrometres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 0 \cdotp 01\) | metre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 0 \cdotp 39370 \, 8\) | inch | |||||||||||
| \(\ds \) | \(=\) | \(\ds 0 \cdotp 0328\) | foot | |||||||||||
| \(\ds \) | \(=\) | \(\ds 0 \cdotp 0109\) | yard |
Decimetre
The decimetre is a metric unit of length.
| \(\ds \) | \(\) | \(\ds 1\) | decimetre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10\) | centimetres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 100\) | millimetres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 0 \cdotp 1\) | 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.
| \(\ds \) | \(\) | \(\ds 1\) | metre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 100\) | centimetres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 1000\) | millimetres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 1 \, 000 \, 000\) | micrometres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 39 \cdotp 3708\) | inches | |||||||||||
| \(\ds \) | \(=\) | \(\ds 3 \cdotp 28\) | feet | |||||||||||
| \(\ds \) | \(=\) | \(\ds 1 \cdotp 09\) | yards |
Hectometre
The hectometre is a metric unit of length.
| \(\ds \) | \(\) | \(\ds 1\) | hectometre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 100\) | metres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10 \, 000\) | centimetres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 100 \, 000\) | millimetres |
Kilometre
The kilometre is a metric unit of length.
| \(\ds \) | \(\) | \(\ds 1\) | kilometre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10\) | hectometres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 100\) | dekametres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 1000\) | metres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 100 \, 000\) | centimetres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^6\) | millimetres | |||||||||||
| \(\ds \) | \(=\) | \(\ds 39 \, 370 \cdotp 4\) | inches | |||||||||||
| \(\ds \) | \(=\) | \(\ds 0.621\) | miles |