Convert Megawatts (MW) to Gigawatts (GW)
1 megawatt equals 0.001 gigawatts.
Megawatt to Gigawatt Converter
What Is a Megawatt?
The megawatt (MW) is an SI unit of power equal to 1,000,000 watts or 1,000 kilowatts. It is the standard unit for individual power plants, wind turbines, solar farms, and industrial installations.
What Is a Gigawatt?
The gigawatt (GW) is an SI unit of power equal to 1,000 megawatts or one billion watts. It is used for national power grid capacity, aggregate generation portfolios, and global energy statistics. The entire US grid is about 1,200 GW.
Megawatts to Gigawatts Formula
The conversion is exact by SI definition:
gigawatts = megawatts ÷ 1,000
Both use SI prefixes: mega = 10⁶, giga = 10⁹. The ratio is exactly 1,000.
Worked Example
Convert 2,500 MW (a large nuclear power station) to gigawatts:
- Divide: 2,500 ÷ 1,000 = 2.5 GW
Common Megawatts to Gigawatts Conversions
| Megawatts | Gigawatts | Context |
|---|---|---|
| 1 MW | 0.001 GW | Small gas turbine / commercial solar |
| 10 MW | 0.01 GW | Offshore wind turbine (modern) |
| 100 MW | 0.1 GW | Large solar farm / small gas plant |
| 500 MW | 0.5 GW | Large coal or gas plant |
| 1,000 MW | 1 GW | Large nuclear reactor |
| 1,210 MW | 1.21 GW | Back to the Future flux capacitor |
| 2,000 MW | 2 GW | Nuclear station (2 units) |
| 5,000 MW | 5 GW | Large hydroelectric complex |
| 10,000 MW | 10 GW | National wind portfolio (small country) |
| 22,500 MW | 22.5 GW | Three Gorges Dam (world's largest) |
| 100,000 MW | 100 GW | Major country's total solar capacity |
Scale of Power Generation
Understanding the MW-to-GW scale helps contextualize energy discussions: 1 MW powers about 750 US homes. 1 GW (1,000 MW) powers about 750,000 homes. The US grid at ~1,200 GW serves about 130 million households and businesses. A single large nuclear reactor (1 GW) produces about 0.08% of US total capacity.
When You Need This Conversion
- Energy policy: National renewable targets are in GW, but individual projects report in MW. "100 GW of solar by 2035" = 100,000 MW = roughly 250 million panels.
- Industry reports: Energy consultancies mix MW and GW in reports. A portfolio of 15,000 MW = 15 GW of installed capacity.
- Grid comparison: Comparing countries: Germany's peak solar output ~50 GW, UK wind capacity ~30 GW, France nuclear ~61 GW.
Frequently Asked Questions
How many MW in a GW?
Exactly 1,000 MW. This is an exact SI definition.
How many homes can 1 GW power?
About 750,000 average US homes. Based on average US household consumption of ~1.25 kW continuously.
What is the largest power plant in GW?
The Three Gorges Dam (China) at 22.5 GW (22,500 MW) nameplate capacity — the world's largest power station by installed capacity.
How do I convert GW back to MW?
Multiply by 1,000. Example: 2.5 GW × 1,000 = 2,500 MW.
Common Megawatt to Gigawatt Conversions
| Megawatt | Gigawatt | Actions |
|---|---|---|
| 1 megawatt | 0.001 gigawatts | |
| 5 megawatts | 0.005 gigawatts | |
| 10 megawatts | 0.01 gigawatts | |
| 25 megawatts | 0.025 gigawatts |
| Megawatt | Gigawatt | Actions |
|---|---|---|
| 50 megawatts | 0.05 gigawatts | |
| 100 megawatts | 0.1 gigawatts | |
| 500 megawatts | 12 gigawatts | |
| 1000 megawatts | 1 gigawatt |
Megawatts to gigawatts Conversion Table
Reference table with common megawatts to gigawatts conversions. All values calculated with high precision.
Megawatts to Gigawatts Table
1000 to 1 × 108
Gigawatts to Megawatts Table
1 to 100000
Looking for the reverse? Convert Gigawatt to Megawatt
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