Ω·m
ohm meter
Electrical resistivityexact by definition
The ohm metre is the SI unit of electrical resistivity, the bulk property of a material independent of the shape of the sample. Numerically it is the resistance measured face to face across a cube of the material one metre on a side. The relation to SI base units is exact by definition, since resistivity is resistance times area divided by length.
Watch out: Resistivity is strongly temperature dependent, roughly 0.4 percent per degree Celsius for copper, so a value is meaningless without the temperature it was measured at. Soil and water resistivity also depend on moisture and dissolved solids.
| 1 Ω·m | 1 Ω·m |
Solvers that use electrical resistivity