Convert Watt to Megawatt (W → MW)

Converting watts to megawatts is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1. 1
   Take your value in watts

   Start with the number of watts (W) you want to convert.
2. 2
   Multiply by 0.000001

   The conversion factor from W to MW is 0.000001. Multiply your value by this number.
3. 3
   Read the result in megawatts

   The result is your value in megawatts (MW).

Multiply the value in watts by 0.000001. For the reverse direction, multiply by 1,000,000.

• ✓1 W = 1 J/s = 1 V × 1 A (for DC).
• ✓LED lighting: 10× more efficient than incandescent.
• ✓For home appliances, rating × hours used = kWh.

• ✗Confusing watts (power) with joules (energy).
• ✗Assuming "100 W bulb" for LED — old incandescent rating.
• ✗Mixing W with V or A — different quantities.

What is the Watt?

The watt is the SI unit of power, equal to one joule per second (1 W = 1 J/s). Named after Scottish engineer James Watt (1736–1819), whose improvements to the steam engine sparked the Industrial Revolution, the watt unifies mechanical, electrical, and thermal power. A typical LED bulb consumes 8–12 W to produce as much light as a 60-W incandescent bulb. Human resting metabolism is about 80–100 W of heat output, while peak athletic performance reaches 400–1,500 W (briefly). The watt is fundamental in electrical engineering: P = V × I (power = voltage × current). It relates to the kilowatt (1 kW = 1,000 W), the megawatt (1 MW = 10⁶ W), horsepower (1 hp ≈ 745.7 W), and the BTU per hour (1 W ≈ 3.412 BTU/h). Light bulb and appliance ratings, electric motor outputs, and audio amplifier specifications all use the watt as the base unit.

• Light-bulb and appliance ratings
• Scientific and engineering power specs
• Radio and electronics power

What is the Megawatt?

The megawatt equals 1,000,000 watts (or 1,000 kW) and rates power plants, large industrial facilities, and grid-scale renewable installations worldwide. A typical natural-gas turbine generates 50–500 MW, a nuclear reactor produces 800–1,600 MW, and the largest hydroelectric plant (Three Gorges Dam in China) has 22,500 MW capacity. Wind turbines are rated 1.5–15 MW each (modern offshore turbines reach 14 MW). Solar farms range from 50 MW (small) to 1,500+ MW (large utility-scale projects). Electric grid demand for entire countries is measured in gigawatts (1 GW = 1,000 MW): the United States peaks at about 750 GW. The megawatt relates to the kilowatt (1,000 kW = 1 MW), the gigawatt (1,000 MW = 1 GW), and the megawatt-hour (when multiplied by time). Electricity wholesale markets bid in MW capacity and MWh energy.

• Power-station electrical output
• Wind and solar farm capacity
• Large industrial electricity consumption