Resistance Converter
Ohm (Ω)
Definition: The ohm (symbol: Ω) is the SI derived unit of electrical resistance. It is named after German physicist Georg Simon Ohm and is defined as the resistance between two points of a conductor when a constant potential difference of one volt applied to these points produces a current of one ampere.
History/origin: The unit was formally defined in 1861 by the British Association for the Advancement of Science. It was part of Georg Ohm's discovery of Ohm's Law, which states that current is proportional to voltage and inversely proportional to resistance.
Current use: The ohm is the standard unit for measuring resistance in all types of electrical circuits, components (like resistors), and electronic devices.
Milliohm (mΩ)
Definition: A milliohm (symbol: mΩ) is a submultiple of the ohm, equal to one-thousandth (1/1,000) of an ohm.
History/origin: As high-precision engineering and power electronics evolved, measuring very low resistance became critical to improving efficiency, leading to the standardized use of the milliohm.
Current use: It is used to measure the resistance of PCB traces, high-current shunts, relay contacts, and internal resistance of high-performance batteries.
Ohm (Ω) to Milliohm (mΩ) Conversion Table
| Ohm (Ω) [ohm] | Milliohm (mΩ) [mohm] |
|---|---|
| 0.01 ohm | 10 mohm |
| 0.1 ohm | 100 mohm |
| 1 ohm | 1000 mohm |
| 2 ohm | 2000 mohm |
| 3 ohm | 3000 mohm |
| 5 ohm | 5000 mohm |
| 10 ohm | 10000 mohm |
| 20 ohm | 20000 mohm |
| 50 ohm | 50000 mohm |
| 100 ohm | 100000 mohm |
| 1000 ohm | 1000000 mohm |
How to Convert Ohm (Ω) to Milliohm (mΩ)
1 ohm = 1000 mohm
1 mohm = 0.001 ohm
Example: convert 15 ohm to mohm:
15 ohm = 15 × 1000 mohm = 15000 mohm
Did You Know?
- Did you know? Electrical resistance is like friction for electricity. Every material has some resistance; materials with very low resistance are called conductors (like copper), while those with extremely high resistance are insulators (like rubber).
- Milliohms are used to measure the resistance of high-quality connectors, battery terminals, and thick power cables where even a tiny amount of resistance can cause significant energy loss as heat.