Ohmmeter

This article explains the unit ohm meter, the meter see resistance meter .

Physical unit
Unit name	Ohmmeter
Unit symbol	${\displaystyle \mathrm {\Omega m} }$
Physical quantity (s)	Specific electrical resistance
Formula symbol	${\displaystyle \rho }$
dimension	${\displaystyle {\mathsf {M\;L^{3}\;T^{-3}\;I^{-2}}}}$
system	International system of units
In SI units	${\displaystyle \mathrm {1\,\Omega m=1\;{\frac {kg\,m^{3}}{A^{2}\,s^{3}}}} }$
Derived from	Volts , amps , meters

The ohmmeter is the coherent SI unit of the specific electrical resistance ρ :

${\displaystyle {\left[\rho \right]}_{\mathrm {SI} }=\mathrm {\Omega m} }$

In this case stands for the unit ohms of resistance and for the unit meters of length . ${\displaystyle \mathrm {\Omega } }$ ${\displaystyle \mathrm {m} }$

This unit is rather unwieldy for practical use. For line material, the specific resistance is usually given in. The following applies: ${\displaystyle \mathrm {\tfrac {\Omega \cdot mm^{2}}{m}} }$

${\displaystyle \mathrm {1\,\Omega m=1\,000\,000\,{\frac {\Omega \cdot mm^{2}}{m}}} }$