Horsepower to Megawatts
Convert horsepower to megawatts instantly — one horsepower is 0.0007457 megawatts.
| Horsepower | Megawatts |
|---|---|
| 1 hp | 0.000746 MW |
| 2 hp | 0.001491 MW |
| 3 hp | 0.002237 MW |
| 5 hp | 0.003728 MW |
| 10 hp | 0.007457 MW |
| 25 hp | 0.018642 MW |
| 50 hp | 0.037285 MW |
| 100 hp | 0.07457 MW |
How to use
- Enter a value in the Horsepower field.
- The Megawatts figure appears immediately — no button to press.
- Typing in the Megawatts field converts back to Horsepower the same way.
- Use the reference table for the values that come up most often.
Horsepower to Megawatts formula
Converting horsepower to megawatts is a single multiplication by 0.000745699872.
MW = hp × 0.000745699872
Why this factor: the horsepower and the megawatt are both defined against the watt, so dividing one definition by the other gives 0.000745699872 directly. Both definitions are set out in full below.
To go the other way, divide by 0.000745699872 — or use the Megawatts to Horsepower converter, which is the same calculation reversed.
Worked example
Take 500 hp and multiply by the factor 0.000745699872: the result is 0.37285 MW.
500 hp × 0.000745699872 = 0.37285 MW
The converter above does this for any value you type, in either direction.
What is a horsepower?
Mechanical horsepower is the traditional English-speaking unit of engine power.
Definition: Defined as 550 foot-pounds per second, which is about 745.700 watts.
Where it is used: US and UK car, motorcycle and small-engine power ratings.
Worth knowing: Distinct from metric horsepower (PS), which is about 1.4% smaller — so the same engine scores slightly higher in PS than in hp.
What is a megawatt?
A megawatt is one million watts, the unit of power-station and grid-scale capacity.
Definition: Exactly 1×10⁶ watts.
Where it is used: Power plant and wind farm output, data-centre capacity, and grid demand.
Horsepower vs Megawatts
The horsepower is an imperial unit while the megawatt is a metric unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many megawatts are in a horsepower?
One horsepower equals 0.000745699872 megawatts.
What is the formula to convert horsepower to megawatts?
Multiply the number of horsepower by 0.000745699872. To reverse it, divide by 0.000745699872 instead.
How do I convert megawatts back to horsepower?
Divide by 0.000745699872, which is the same as multiplying by 1341.02209.
How many megawatts are in 10 horsepower?
10 hp works out to 0.007457 MW.
Is there anything to watch out for with horsepower?
Distinct from metric horsepower (PS), which is about 1.4% smaller — so the same engine scores slightly higher in PS than in hp.
How is the horsepower defined?
Defined as 550 foot-pounds per second, which is about 745.700 watts.