Megawatts to gigawatts
Type a value in megawatts to see it in gigawatts straight away, or type in the second box to convert back.
Loading the tool…
Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the megawatts box.
- Read the result in gigawatts as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
GW = MW × 0.001
Multiply the value in megawatts by 0.001 to get gigawatts.
Example
To convert 25 MW to gigawatts: 25 × 0.001 = 0.025 GW.
Conversion table
| Megawatts (MW) | Gigawatts (GW) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1,000 | 1 |
About the units
- Megawatt
- A megawatt is exactly one million watts, used for power plants and wind turbines.
- Gigawatt
- A gigawatt is exactly one billion watts, used for large power stations and national grids.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many gigawatts are in one megawatt?
1 MW = 0.001 GW exactly.
How do I convert megawatts to gigawatts?
Use GW = MW × 0.001. For example, 25 MW = 0.025 GW.
How many megawatts are in one gigawatt?
1 GW = 1,000 MW.
What is the difference between mechanical and metric horsepower?
Mechanical horsepower is about 745.7 watts and is used in the US, while metric horsepower (PS) is 735.5 watts and is used in Europe and Japan. The same engine therefore shows a PS figure about 1.4% higher.
How many kilowatts is one ton of refrigeration?
One ton of refrigeration is 12000 BTU per hour, about 3.517 kW of cooling capacity. That is cooling output, not electricity use; the unit draws less power depending on its efficiency.