52 horsepower works out to 38.77639332 kW. The calculation is 52 × 0.7456998716, and the unrounded result is 38.7763933223 kilowatts, which is the number to use if this feeds into anything else.
38.7764 kW is 52 mechanical horsepower and 52.72 metric PS. Put that through a 1,400 kg car at 80% drivetrain efficiency and the energy needed to reach 100 km/h — 540.1 kJ — takes about 17.4 seconds to deliver, which is a floor rather than a real figure because it ignores drag and traction limits.
The result sits 1.224 kW short of 40 kW, so if you need a round figure to quote, 40 kW is the honest nearest one. Plenty of people do this in their head: divide by 1.3 instead of using the exact factor 0.7456998716. At 52 that shortcut gives 40 kilowatts, off by 1.224 kilowatts or about 3.16%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
The formula
52 hp- The quantity being converted
0.7456998716- Exact kilowatts in one horsepower
38.77639332 kW- The converted result
How it works, step by step
- Begin from the figure you have: 52 horsepower.
- Multiply by 0.7456998716, the exact number of kilowatts in one horsepower.
- That gives 38.7763933223 kilowatts.
- To reverse it, divide by 0.7456998716 instead: 38.77639332 kW ÷ 0.7456998716 returns 52 hp.
Worked examples
Step by step
Because this is a straight proportion, 52 hp × 0.7456998716 = 38.7763933223 kW — no offset, no second term, nothing else to account for.
Proving it both ways
Run it in reverse — 38.77639332 kW ÷ 0.7456998716 = 52 hp. Matching the input you started from is the proof the direction is right.
How to read your score
Frequently asked questions
What is 52 horsepower in kilowatts?
The answer is 38.77639332 kW — or 38.7763933223 kilowatts before any rounding.
How do you convert horsepower to kilowatts?
Use the factor 0.7456998716 as a multiplier — 52 × 0.7456998716 gives 38.77639332 kilowatts. The same factor works at any scale because the relationship is linear.
What is 38.77639332 kilowatts back in horsepower?
52 horsepower. Dividing by 0.7456998716 undoes the conversion exactly.
Is 52 hp a lot?
38.7764 kW is 52 mechanical horsepower and 52.72 metric PS. Put that through a 1,400 kg car at 80% drivetrain efficiency and the energy needed to reach 100 km/h — 540.1 kJ — takes about 17.4 seconds to deliver, which is a floor rather than a real figure because it ignores drag and traction limits. The reference table shows the values either side of it for comparison.
What is a horsepower?
Mechanical horsepower, defined by James Watt as 550 foot-pounds per second.
What is a kilowatt?
The rating unit for motors, EV chargers and solar arrays.
52 hp in kilowatts — nearby values
| Horsepower | Kilowatts | Unrounded |
|---|---|---|
| 46 hp | 34.302194 | 34.30219409 |
| 47 hp | 35.047894 | 35.04789396 |
| 48 hp | 35.793594 | 35.79359384 |
| 49 hp | 36.539294 | 36.53929371 |
| 50 hp | 37.284994 | 37.28499358 |
| 51 hp | 38.030693 | 38.03069345 |
| 52 hp | 38.776393 | 38.77639332 |
| 53 hp | 39.522093 | 39.52209319 |
| 54 hp | 40.267793 | 40.26779307 |
| 55 hp | 41.013493 | 41.01349294 |
| 56 hp | 41.759193 | 41.75919281 |
| 57 hp | 42.504893 | 42.50489268 |
| 58 hp | 43.250593 | 43.25059255 |
Exact factor: 1 horsepower = 0.745699871582 kilowatts. The row for 52 hp is the value this page is about.