Ohm (Ω)
SI unit of electric resistance: one volt per ampere.
What is an ohm?
- Symbol
- Ω
- Quantity
- Electric Resistance
- Unit system
- SI
- Definition
- SI unit of electric resistance: one volt per ampere.
- Exact
- Yes, the value is exact by definition
- Source
- SI Brochure, 9th edition (BIPM, 2019)
Common applications
Used for resistors, speaker and headphone impedance, heating elements and circuit design.
Ohm in other electric resistance units
- 1 Ω = 1000000 µΩMicroohm
- 1 Ω = 1000 mΩOhm to Milliohm converter
- 1 Ω = 0.001 kΩOhm to Kiloohm converter
- 1 Ω = 0.000001 MΩMegaohm
- 1 Ω = 1e-9 GΩGigaohm
- 1 Ω = 1000000000 abΩAbohm
- 1 Ω ≈ 1.112650056e-12 statΩStatohm
Ohm quick reference
| Ohm | Milliohm | Kiloohm | Microohm |
|---|---|---|---|
| 1 Ω | = 1000 mΩ | = 0.001 kΩ | = 1000000 µΩ |
| 10 Ω | = 10000 mΩ | = 0.01 kΩ | = 10000000 µΩ |
| 100 Ω | = 100000 mΩ | = 0.1 kΩ | = 100000000 µΩ |
| 1000 Ω | = 1000000 mΩ | = 1 kΩ | = 1000000000 µΩ |
Where the ohm fits
The next smaller electric resistance unit is the milliohm (mΩ). 1 Ω = 1000 mΩ, and 1 mΩ = 0.001 Ω.
The next larger electric resistance unit is the kiloohm (kΩ). 1 Ω = 0.001 kΩ, and 1 kΩ = 1000 Ω.
Frequently asked questions
- How many milliohms are in one ohm?
- One ohm = 1000 mΩ (milliohms).
- How many kiloohms are in one ohm?
- One ohm = 0.001 kΩ (kiloohms).
- How many microohms are in one ohm?
- One ohm = 1000000 µΩ (microohms).