Megohms to ohms
Type a value in megohms to see it in ohms straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the megohms box.
- Read the result in ohms as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
Ω = MΩ × 1,000,000
Multiply the value in megohms by 1,000,000 to get ohms.
Example
To convert 25 MΩ to ohms: 25 × 1,000,000 = 25,000,000 Ω.
Conversion table
| Megohms (MΩ) | Ohms (Ω) |
|---|---|
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 3 | 3,000,000 |
| 5 | 5,000,000 |
| 10 | 10,000,000 |
| 20 | 20,000,000 |
| 25 | 25,000,000 |
| 50 | 50,000,000 |
| 100 | 100,000,000 |
| 250 | 250,000,000 |
| 500 | 500,000,000 |
| 1,000 | 1,000,000,000 |
About the units
- Megohm
- A megohm is exactly one million ohms, used in cable and motor insulation testing and high input resistances.
- Ohm
- The SI unit of resistance: a conductor that carries one ampere under one volt has one ohm, so 1 Ω = 1 V/A.
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 ohms are in one megohm?
1 MΩ = 1,000,000 Ω exactly.
How do I convert megohms to ohms?
Use Ω = MΩ × 1,000,000. For example, 25 MΩ = 25,000,000 Ω.
How many megohms are in one ohm?
1 Ω = 0.000001 MΩ.
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.