Resistance Converter
Ohm (Ω)
Definition: The ohm (symbol: Ω) is the SI derived unit of electrical resistance. It is defined as the resistance between two points of a conductor when a constant potential difference of one volt produces a current of one ampere.
History/origin: Named after the German physicist Georg Simon Ohm. It was formally defined in 1861 by the British Association for the Advancement of Science following Ohm's discovery of the mathematical law relating current, voltage, and resistance.
Current use: The ohm is the standard unit for measuring resistance in all types of electrical circuits, components (like resistors), and electronic devices globally.
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 for improving energy efficiency and safety.
Current use: Used to measure the resistance of PCB traces, high-current shunts, 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 (mΩ) 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 energy loss as heat.