20 W to MW — 20 watts in megawatts
Exact 20 ÷ 1,000,000 = 0.00002
20 watts in other units
| Kilowatts | 0.02 | kW |
|---|---|---|
| Megawatts | 0.00002 | MW |
| Mechanical horsepower | 0.02682044 | hp |
| Metric horsepower | 0.02719243 | PS |
| BTU per hour | 68.242833 | BTU/h |
| Foot-pounds per second | 14.751243 | ft·lbf/s |
W to MW at a glance
| Watts | Megawatts |
|---|---|
| 1 W | 0.000001 MW |
| 2 W | 0.000002 MW |
| 3 W | 0.000003 MW |
| 5 W | 0.000005 MW |
| 10 W | 0.00001 MW |
| 20 W | 0.00002 MW |
| 25 W | 0.000025 MW |
| 50 W | 0.00005 MW |
| 100 W | 0.0001 MW |
| 250 W | 0.00025 MW |
| 500 W | 0.0005 MW |
| 1,000 W | 0.001 MW |
How to convert watts to megawatts
Multiply by 0.000001 — one watt is 0.000001 megawatts. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 20 ÷ 1,000,000 = 0.00002
What these units are
The watt and the megawatt are covered in the power unit guide, along with every other unit on this page.
Questions
How many megawatts are in a watt?
One watt is 0.000001 megawatts. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 20 watts in megawatts?
20 watts is 0.00002 megawatts. The working is 20 ÷ 1,000,000 = 0.00002.
Why does the same car have two different horsepower figures?
Because there are two horsepowers. Metric horsepower, written PS or CV, is 735.49875 W; mechanical horsepower, written hp or bhp, is about 745.7 W. A car sold as 150 PS in Germany is 148 hp in Britain, and nothing about the engine has changed.
Where does 746 watts come from?
From James Watt, who needed to sell steam engines to people who owned horses. He measured a mill horse turning a wheel and settled on 550 foot-pounds per second — a figure most real horses cannot sustain, which made the comparison flattering to his engines.
How do I read an air conditioner's BTU rating?
BTU ratings are BTU per hour, a rate of heat movement, even when the "per hour" is dropped. A 12,000 BTU/h unit shifts about 3.5 kW of heat. That is not what it draws from the wall — a decent unit moves several times more heat than the electricity it consumes.
What is the difference between power and energy?
Power is a rate, energy is an amount. A kilowatt is how fast something uses energy; a kilowatt-hour is how much it used. A 2 kW heater running for three hours has a power of 2 kW throughout and has consumed 6 kWh. Bills are in energy; ratings are in power.