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Electric Resistivity Converter

Convert between electric resistivity units: ohm meter (Ω·m), ohm centimeter (Ω·cm), microohm meter (µΩ·m), and more.

What this tool does

Convert between electric resistivity units: ohm meter (Ω·m), ohm centimeter (Ω·cm), microohm meter (µΩ·m), and more. Type an amount in ohm meters, choose the units, and the tool converts it to ohm centimeters. It offers 8 electrical resistivity units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Ohm meter, Ohm centimeter, Ohm millimeter, Microohm meter, Nanoohm meter, Microohm centimeter, Abohm centimeter, Ohm circular mil per foot. Starts as Ohm meter.
  • To: Choose one of the same 8 units as "From". Starts as Ohm centimeter.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from ohm meters to ohm centimeters:

  • 1 Ω·m = 100 Ω·cm
  • 5 Ω·m = 500 Ω·cm
  • 10 Ω·m = 1,000 Ω·cm
  • 50 Ω·m = 5,000 Ω·cm
  • 100 Ω·m = 10,000 Ω·cm

Multiply the number of ohm meters by 100 to get ohm centimeters. Both units are exact definitions, so 100 is the exact factor: 1 Ω·m = 100 Ω·cm.

Sources: Ohm meter: SI Brochure, 9th edition (2019). Ohm centimeter: NIST SP 811 (2008), Appendix B.9.

Limitations

  • Converts resistivity only. It does not calculate the resistance of a wire from its length and thickness.

FAQs

Q: How do I convert ohm meters to ohm centimeters?
A: Enter the value, choose ohm meters as the From unit and ohm centimeters as the To unit. The result and the other units in the list update immediately. To go the other way, swap the two units.
Q: What is ohm circular mil per foot?
A: It is a US wire-industry unit of resistivity, used with wire sizes given in circular mils. One ohm circular mil per foot is about 1.6624 × 10⁻⁹ ohm meters.
Q: Is resistivity the same as resistance?
A: No. Resistance belongs to a particular piece of wire. Resistivity is a property of the material, and resistance follows from it with the length and cross-section.

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