Power Unit Conversion Tool
Whether you're evaluating appliance energy consumption, designing electrical circuits, analyzing renewable energy generation capacity, or reading news reports (e.g., “a wind farm with 500 MW installed capacity”), power unit conversion is a frequent task for engineers, students, energy professionals, and everyday users.
Power units span an enormous range—from the few milliwatts (mW) of a headphone output, to the kilowatts (kW) of a household air conditioner, up to gigawatt (GW)-scale outputs of nuclear power plants. Manual conversions are not only tedious but also prone to errors—especially when misjudging orders of magnitude.
To address this, we offer a professional Power Unit Conversion Tool that supports instant, high-precision conversion among the following 5 internationally recognized power units:
- Watt (W) — the SI base unit of power
- Milliwatt (mW) — one-thousandth of a watt; commonly used in electronics and audio signals
- Kilowatt (kW) — standard for household appliances, electric vehicles, and small generators
- Megawatt (MW) — typical for wind farms, large factories, and city-scale power supply
- Gigawatt (GW) — used for national grids, large hydroelectric or nuclear power stations
Simply enter a value, select the source and target units, and get an accurate result instantly!
🔁 Power Unit Conversion Formulas
All units follow the decimal-based SI prefixes, ensuring clear and consistent relationships:
| Conversion Direction | Formula |
|---|---|
| W → mW | mW = W × 1,000 |
| mW → W | W = mW ÷ 1,000 |
| W → kW | kW = W ÷ 1,000 |
| kW → W | W = kW × 1,000 |
| kW → MW | MW = kW ÷ 1,000 |
| MW → kW | kW = MW × 1,000 |
| MW → GW | GW = MW ÷ 1,000 |
| GW → MW | MW = GW × 1,000 |
| W → GW | GW = W ÷ 1,000,000,000 |
| mW → GW | GW = mW ÷ 1,000,000,000,000 |
💡 Did You Know?
- 1 W = 1 joule per second (J/s)
- LED light bulb ≈ 5–15 W
- Household air conditioner ≈ 1–3 kW
- 1 MW can power approximately 750 average households
- The Three Gorges Dam has a total installed capacity of ≈ 22.5 GW
⚡ Common Power Unit Conversion Reference Table
| Watts (W) | Milliwatts (mW) | Kilowatts (kW) | Megawatts (MW) | Gigawatts (GW) |
|---|---|---|---|---|
| 0.001 | 1 | 0.000001 | 1e-9 | 1e-12 |
| 1 | 1,000 | 0.001 | 1e-6 | 1e-9 |
| 1,000 | 1,000,000 | 1 | 0.001 | 1e-6 |
| 100,000 | 100,000,000 | 100 | 0.1 | 1e-4 |
| 1,000,000 | 1e9 | 1,000 | 1 | 0.001 |
| 1e9 | 1e12 | 1,000,000 | 1,000 | 1 |
✅ Example References
- Bluetooth headphone output power ≈ 10 mW = 0.01 W
- Microwave oven rated power ≈ 1,200 W = 1.2 kW
- Large wind turbine capacity ≈ 5 MW
- Global average per capita electricity consumption ≈ 0.003 GW (i.e., 3 MW)
✨ Tool Advantages
- Full coverage of 5 units: Seamlessly convert from tiny signals to national-scale energy levels
- High-precision engine: Supports decimals, integers, and scientific notation (e.g.,
2.5e6) - Real-time calculation: Results appear instantly as you type—no need to click a “Convert” button
- Completely free · No ads · No registration required
- Responsive design: Works flawlessly on smartphones, tablets, and desktop computers
🌐 Try It Now!
💡 Make power conversion simple, intuitive, and error-free!
Whether you're running experiments, reviewing your electricity bill, planning a solar system, or interpreting energy news—this tool is your ideal assistant.
🔌 Give it a try today—precisely manage every watt!