Nanometre

nanometre
One nanometric carbon nanotube, photographed with scanning tunneling microscope
General information
Unit system	SI
Unit of	length
Symbol	nm
Conversions
1 nm in ...	... is equal to ...
SI units	1×10−9 m    1×103 pm
Natural units	6.1877×1025 ℓP  18.897 a0
imperial/US units	3.9370×10−8 in

The nanometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: nm), or nanometer (American spelling), is a unit of length in the International System of Units (SI), equal to one billionth (short scale) or one thousand million (long scale) of a meter (0.000000001 m) and to 1000 picometres. One nanometre can be expressed in scientific notation as 1 × 10⁻⁹ m and as ⁠1/1000000000⁠ m.