Watts to Megawatts
Convert watts to megawatts instantly. 1 W = 1e-06 MW. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert watts to megawatts
To convert watts to megawatts, divide by 1,000,000 (multiply by 1e-06). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
MW = W × 1e-06
Watts to Megawatts conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Watts | Megawatts |
|---|---|
| 1 W | 1e-06 MW |
| 2 W | 2e-06 MW |
| 3 W | 3e-06 MW |
| 5 W | 5e-06 MW |
| 10 W | 1e-05 MW |
| 20 W | 2e-05 MW |
| 25 W | 2.5e-05 MW |
| 50 W | 5e-05 MW |
| 100 W | 0.0001 MW |
| 500 W | 0.0005 MW |
| 1,000 W | 0.001 MW |
What is a watt?
The SI unit of power: one joule per second.
What is a megawatt?
A million watts, the scale of power stations and wind farms.
The formula
MW = W × 1e-06
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Watts to Megawatts
- Type the number of watts you want to convert.
- Read the result in megawatts straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked megawatts to watts page.
Watts to Megawatts — frequently asked questions
How many megawatts are in a watt?
One watt equals 1e-06 MW. MW = W × 1e-06
What is the formula to convert watts to megawatts?
The formula is MW = W × 1e-06. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert megawatts back to watts?
Divide instead of multiplying: one megawatt is 1,000,000 W. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this watts to megawatts free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error