Electrical Resistance Conversion
Quick answer: 1 kΩ = 1,000 Ω, 1 MΩ = 1,000,000 Ω, 1 mΩ = 0.001 Ω; an insulation resistance of 500 MΩ = 0.5 GΩ and 4.7 kΩ = 4,700 Ω.
Ohms, milliohms, kilohms, megohms and gigaohms, plus the abohm and statohm – resistance of conductors, resistors and insulation.
How the calculation works
Enter a resistance and choose the unit. The table shows the same resistance in nΩ, µΩ, mΩ, Ω, kΩ, MΩ and GΩ, in V/A and in the CGS abohm and statohm.
Formula and assumptions
The base unit is the ohm (1 Ω = 1 V/A). By Ohm’s law R = V/I. SI prefixes: 1 kΩ = 10³ Ω, 1 MΩ = 10⁶ Ω, 1 mΩ = 10⁻³ Ω. CGS: 1 abΩ = 10⁻⁹ Ω, 1 statΩ ≈ 8.988 × 10¹¹ Ω.
More worked examples
- A 4.7 kΩ resistor = 4,700 Ω.
- An earthing resistance of 10 Ω = 0.01 kΩ.
- Insulation of 200 MΩ = 0.2 GΩ.
- A cable at 15 mΩ = 0.015 Ω.
Units of resistance
| Unit | in Ω | Example |
|---|---|---|
| 1 mΩ | 0.001 | contact, cable |
| 1 Ω | 1 | earthing |
| 1 kΩ | 1,000 | resistor |
| 1 MΩ | 1,000,000 | insulation |
| 1 GΩ | 10⁹ | insulation (test) |
| 1 V/A | 1 | = 1 Ω |
Common mistakes
- Confusing mΩ and MΩ.
- Mixing resistance (Ω) with material resistivity (Ω·m, Ω·mm²/m).
- Measuring resistance on a live circuit.
Frequently asked questions
How many ohms are in 1 kΩ?
1 kΩ = 1,000 Ω.
How many kΩ are in 1 MΩ?
1 MΩ = 1,000 kΩ = 1,000,000 Ω.
How do I calculate resistance from voltage and current?
R = V / I: 12 V at 0.5 A gives 24 Ω.
What is resistivity?
A material property in Ω·m or Ω·mm²/m (copper ≈ 0.0175 Ω·mm²/m); it is under “Electrical resistivity”.
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Publisher: Art-Visum d.o.o. · Content reviewed:
Calculations use common consumption rates and manufacturers' technical data sheets; results are estimates. Methodology · Standards · About