Microohm (µΩ)
One millionth of an ohm. Used for contact and busbar resistance.
What is a microohm?
- Symbol
- µΩ
- Quantity
- Electric Resistance
- Unit system
- SI
- Definition
- One millionth of an ohm. Used for contact and busbar resistance.
- Exact
- Yes, the value is exact by definition
- Source
- SI Brochure, 9th edition (BIPM, 2019)
Common applications
Used for contact resistance in switches and breakers, busbars and bonded joints.
Microohm in other electric resistance units
Microohm quick reference
| Microohm | Ohm | Kiloohm | Milliohm |
|---|---|---|---|
| 1 µΩ | = 0.000001 Ω | = 1e-9 kΩ | = 0.001 mΩ |
| 10 µΩ | = 0.00001 Ω | = 1e-8 kΩ | = 0.01 mΩ |
| 100 µΩ | = 0.0001 Ω | = 1e-7 kΩ | = 0.1 mΩ |
| 1000 µΩ | = 0.001 Ω | = 0.000001 kΩ | = 1 mΩ |
Where the microohm fits
The next smaller electric resistance unit is the abohm (abΩ). 1 µΩ = 1000 abΩ, and 1 abΩ = 0.001 µΩ.
The next larger electric resistance unit is the milliohm (mΩ). 1 µΩ = 0.001 mΩ, and 1 mΩ = 1000 µΩ.
Frequently asked questions
- How many ohms are in one microohm?
- One microohm = 0.000001 Ω (ohms).
- How many kiloohms are in one microohm?
- One microohm = 1e-9 kΩ (kiloohms).
- How many milliohms are in one microohm?
- One microohm = 0.001 mΩ (milliohms).