Ohms to milliohms
Type a value in ohms to see it in milliohms straight away, or type in the second box to convert back.
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How to use it
- Type the value in the ohms box.
- Read the result in milliohms as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
mΩ = Ω × 1,000
Multiply the value in ohms by 1,000 to get milliohms.
Example
To convert 25 Ω to milliohms: 25 × 1,000 = 25,000 mΩ.
Conversion table
| Ohms (Ω) | Milliohms (mΩ) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1,000 | 1,000,000 |
About the units
- Ohm
- The SI unit of resistance: a conductor that carries one ampere under one volt has one ohm, so 1 Ω = 1 V/A.
- Milliohm
- A milliohm is exactly one thousandth of an ohm, used for connections, heavy cables and battery internal resistance.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many milliohms are in one ohm?
1 Ω = 1,000 mΩ exactly.
How do I convert ohms to milliohms?
Use mΩ = Ω × 1,000. For example, 25 Ω = 25,000 mΩ.
How many ohms are in one milliohm?
1 mΩ = 0.001 Ω.
What does the k in a resistor value mean?
It means kilo, or 1000, so a 4.7k resistor is 4700 ohms. Schematics sometimes write the same value as 4K7.
How do I work out resistance from voltage and current?
Use Ohm's law: resistance equals voltage divided by current. 12 V with 0.5 A means 24 ohms.