Electrical Resistivity Converter
Electrical Resistivity Converter: convert between 9 electrical resistivity units, for example 1 µΩ·cm = 1 × 10⁻⁸ Ω·m.
| Unit | Value |
|---|---|
| microohm centimetre to ohm metre | 1 × 10⁻⁸ Ω·m |
| microohm centimetre to ohm centimetre | 0.000001 Ω·cm |
| microohm centimetre (µΩ·cm) | 1 µΩ·cm |
| microohm centimetre to microohm metre | 0.01 µΩ·m |
| microohm centimetre to nanoohm metre | 10 nΩ·m |
| microohm centimetre to ohm square millimetre per metre | 0.01 Ω·mm²/m |
| microohm centimetre to ohm circular mil per foot | 6.015304936 Ω·cmil/ft |
| microohm centimetre to kiloohm centimetre | 1 × 10⁻⁹ kΩ·cm |
| microohm centimetre to megaohm centimetre | 1 × 10⁻¹² MΩ·cm |
Convert between Ω·m, Ω·cm, µΩ·cm, µΩ·m, nΩ·m, Ω·mm²/m, Ω·cmil/ft, kΩ·cm and MΩ·cm. Resistivity ρ is a material property; the resistance of a wire is R = ρL/A.
Resistivity and conductivity
Conductivity is the reciprocal of resistivity: σ = 1/ρ. Copper at 1.7241 µΩ·cm has σ = 58 MS/m, which is 100 %IACS. Resistivity rises with temperature (about 0.39 % per °C for copper), so compare values at the same temperature, usually 20 °C.
Electrical Resistivity unit definitions
- ohm metre (Ω·m)
- The ohm metre is the SI unit of resistivity (ρ), the property that sets how strongly a material resists current: R = ρL/A. Copper is about 1.72 × 10⁻⁸ Ω·m at 20 °C.
- microohm centimetre (µΩ·cm)
- The microohm centimetre is 10⁻⁸ Ω·m, a convenient size for metals: silver 1.59, copper 1.72, aluminium 2.65, stainless steel about 72 µΩ·cm at 20 °C.
- ohm centimetre (Ω·cm)
- The ohm centimetre is one hundredth of an ohm metre. Semiconductor wafers, soils and water resistivity are commonly quoted in Ω·cm.
- ohm square millimetre per metre (Ω·mm²/m)
- The ohm square millimetre per metre is the resistance of a conductor 1 m long with a 1 mm² cross-section. Electricians and cable makers use it because wire sizes are given in mm²: annealed copper is 1/58 ≈ 0.01724 Ω·mm²/m.
- megaohm centimetre (MΩ·cm)
- The megaohm centimetre is 10⁶ Ω·cm. Ultrapure water is specified by resistivity: the theoretical maximum at 25 °C is about 18.2 MΩ·cm.
- microohm metre (µΩ·m)
- The microohm metre is 10⁻⁶ Ω·m. It is numerically equal to Ω·mm²/m; heating alloys such as nichrome are about 1.1 µΩ·m.
Show 3 more units
- nanoohm metre (nΩ·m)
- The nanoohm metre is 10⁻⁹ Ω·m. Physics handbooks often list metal resistivities in nΩ·m: copper is about 17.2 nΩ·m at 20 °C.
- ohm circular mil per foot (Ω·cmil/ft)
- The ohm circular mil per foot is the US wire-table unit of resistivity: the resistance of one foot of wire with a cross-section of one circular mil. Annealed copper is about 10.37 Ω·cmil/ft at 20 °C.
- kiloohm centimetre (kΩ·cm)
- The kiloohm centimetre is 1000 Ω·cm. Soil and process water resistivities are sometimes quoted in kΩ·cm.
Popular electrical resistivity conversions
- ohm metre to ohm centimetre
- ohm metre to microohm centimetre
- ohm centimetre to ohm metre
- microohm centimetre to ohm metre
Show all 72 electrical resistivity conversions
From ohm metres
From ohm centimetres
From microohm centimetres
- microohm centimetre to ohm metre
- microohm centimetre to ohm centimetre
- microohm centimetre to microohm metre
- microohm centimetre to nanoohm metre
- microohm centimetre to ohm square millimetre per metre
- microohm centimetre to ohm circular mil per foot
- microohm centimetre to kiloohm centimetre
- microohm centimetre to megaohm centimetre
From microohm metres
From nanoohm metres
From ohm square millimetres per metre
- ohm square millimetre per metre to ohm metre
- ohm square millimetre per metre to ohm centimetre
- ohm square millimetre per metre to microohm centimetre
- ohm square millimetre per metre to microohm metre
- ohm square millimetre per metre to nanoohm metre
- ohm square millimetre per metre to ohm circular mil per foot
- ohm square millimetre per metre to kiloohm centimetre
- ohm square millimetre per metre to megaohm centimetre
From ohm circular mils per foot
- ohm circular mil per foot to ohm metre
- ohm circular mil per foot to ohm centimetre
- ohm circular mil per foot to microohm centimetre
- ohm circular mil per foot to microohm metre
- ohm circular mil per foot to nanoohm metre
- ohm circular mil per foot to ohm square millimetre per metre
- ohm circular mil per foot to kiloohm centimetre
- ohm circular mil per foot to megaohm centimetre
From kiloohm centimetres
- kiloohm centimetre to ohm metre
- kiloohm centimetre to ohm centimetre
- kiloohm centimetre to microohm centimetre
- kiloohm centimetre to microohm metre
- kiloohm centimetre to nanoohm metre
- kiloohm centimetre to ohm square millimetre per metre
- kiloohm centimetre to ohm circular mil per foot
- kiloohm centimetre to megaohm centimetre
From megaohm centimetres
- megaohm centimetre to ohm metre
- megaohm centimetre to ohm centimetre
- megaohm centimetre to microohm centimetre
- megaohm centimetre to microohm metre
- megaohm centimetre to nanoohm metre
- megaohm centimetre to ohm square millimetre per metre
- megaohm centimetre to ohm circular mil per foot
- megaohm centimetre to kiloohm centimetre
Related converters
- Electrical Conductivity Converter – S/m, MS/m, µS/cm, mS/cm, dS/m, %IACS
- Length Converter – m, km, cm, mm, µm, ft, in, mi, yd, nmi
- Area Converter – m², cm², mm², ft², in², test areas
- Printable electrical resistivity conversion chart – print, PDF or PNG
- %IACS to MS/m (conductivity)
- µS/cm to mS/cm (water conductivity)
- Wire Resistance Calculator – Conductor (or ρ, %IACS) + length + cross-section → resistance at 20 °C.
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Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology.
- Copper Wire Tables, NBS Handbook 100 (International Annealed Copper Standard), National Bureau of Standards (now NIST).
Last reviewed: .