How this conversion works
The ohm is the SI unit of resistance (one volt per ampere). Resistor values use metric prefixes: 4.7 kΩ is 4,700 Ω.
CGS units: 1 abohm = 10⁻⁹ Ω; 1 statohm ≈ 8.987552 × 10¹¹ Ω.
Formula: result = value × (base units per source unit) ÷ (base units per target unit)
Where this conversion is used
- Reading resistor values and color-code results in Ω, kΩ or MΩ.
- Insulation resistance tests in megaohms.
- Wire and contact resistance in milliohms.
Worked example: A 4.7 kΩ resistor in ohms
- 1 kΩ = 1,000 Ω.
- 4.7 × 1,000 = 4,700 Ω.
Unit definitions
| Unit | In ohms | Note |
|---|---|---|
| Ohm (Ω) | 1 | |
| Milliohm (mΩ) | 0.001 | |
| Kiloohm (kΩ) | 1,000 | |
| Megaohm (MΩ) | 1,000,000 | |
| Gigaohm (GΩ) | 1,000,000,000 | |
| Abohm (abΩ) | 1e-9 | |
| Statohm (statΩ) | 898,755,178,737 | ≈ 8.987552 × 10¹¹ Ω. |
Kiloohms to ohms
| Kiloohm (kΩ) | Ohm (Ω) |
|---|---|
| 1 | 1,000 |
| 2.2 | 2,200 |
| 4.7 | 4,700 |
| 10 | 10,000 |
| 47 | 47,000 |
| 100 | 100,000 |
Megaohms to kiloohms
| Megaohm (MΩ) | Kiloohm (kΩ) |
|---|---|
| 0.1 | 100 |
| 1 | 1,000 |
| 2.2 | 2,200 |
| 10 | 10,000 |
Things to watch for
- Resistor markings like “4K7” mean 4.7 kΩ; the letter replaces the decimal point.
Precision and sources
Results are calculated from the definitions above and rounded to 12 significant digits; the converter shows up to eight decimal places and the tables four. Reference: BIPM, The International System of Units (SI Brochure), 9th edition (2019).
Frequently asked questions
How many ohms are in a megaohm?
1,000,000.