Ohms to megohms
Type a value in ohms to see it in megohms straight away, or type in the second box to convert back.
Loading the tool…
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 ohms box.
- Read the result in megohms 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 × 0.000001
Multiply the value in ohms by 0.000001 to get megohms.
Example
To convert 25 Ω to megohms: 25 × 0.000001 = 0.000025 MΩ.
Conversion table
| Ohms (Ω) | Megohms (MΩ) |
|---|---|
| 1 | 0.000001 |
| 2 | 0.000002 |
| 3 | 0.000003 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 20 | 0.00002 |
| 25 | 0.000025 |
| 50 | 0.00005 |
| 100 | 0.0001 |
| 250 | 0.00025 |
| 500 | 0.0005 |
| 1,000 | 0.001 |
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.
- Megohm
- A megohm is exactly one million ohms, used in cable and motor insulation testing and high input resistances.
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 megohms are in one ohm?
1 Ω = 0.000001 MΩ exactly.
How do I convert ohms to megohms?
Use MΩ = Ω × 0.000001. For example, 25 Ω = 0.000025 MΩ.
How many ohms are in one megohm?
1 MΩ = 1,000,000 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.