ohm centimeter Unit Converter

Definition of ohm centimeter unit

An ohm centimeter (Ω·cm) is a unit of electrical resistivity in the centimeter–gram–second-related system. A material has resistivity of 1 Ω·cm when a one-centimeter cube exhibits resistance of 1 ohm between opposite faces.

History of ohm centimeter unit

The ohm centimeter developed from practical electrical engineering’s need to express resistivity using centimeter-based dimensions, especially before the SI system became universal. The ohm itself was named after German physicist Georg Simon Ohm, whose nineteenth-century work established the relationship between voltage, current, and resistance. Resistivity measurements combined the ohm with centimeter geometry in laboratory and industrial practice. Although the SI unit is now the ohm meter, Ω·cm remains widely used because semiconductor, electronic-material, and biological measurements often involve small samples and centimeter-scale calculations.

Applications of ohm centimeter unit

Ohm centimeters are commonly used to report the resistivity of semiconductors, conductive polymers, ceramics, soils, and biological materials. For example, silicon wafer specifications may list resistivity in Ω·cm, helping engineers assess doping concentration and electrical performance. The unit also appears in four-point-probe testing, geological surveys, corrosion studies, and material datasheets where centimeter-based sample dimensions make calculations convenient.

Complete list of ohm centimeter unit conversion