The short answer: 64 horsepower comes to 47.72479178 kW. That is 64 multiplied by 0.7456998716, the factor fixed by definition, carried to full precision before anything is rounded for display.
47.7248 kW is 64 mechanical horsepower and 64.89 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 14.1 seconds to deliver, which is a floor rather than a real figure because it ignores drag and traction limits.
The result sits 2.275 kW short of 50 kW, so if you need a round figure to quote, 50 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 64 that shortcut gives 49.230769 kilowatts, off by 1.506 kilowatts or about 3.16%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
The formula
64 hp- The quantity being converted
0.7456998716- Exact kilowatts in one horsepower
47.72479178 kW- The converted result
How it works, step by step
- Start with 64 horsepower.
- Multiply by 0.7456998716, the exact number of kilowatts in one horsepower.
- Result: 47.7247917813 kilowatts.
- Going the other way, divide rather than multiply — 47.72479178 kW ÷ 0.7456998716 brings you back to 64 hp.
Worked examples
The conversion itself
64 hp × 0.7456998716 = 47.7247917813 kW. One multiplication, with no rounding until the value reaches the screen.
Verifying the result
Run it in reverse — 47.72479178 kW ÷ 0.7456998716 = 64 hp. Matching the input you started from is the proof the direction is right.
How to read your score
Frequently asked questions
What is 64 horsepower in kilowatts?
64 horsepower is exactly 47.72479178 kW. Carried to full precision that is 47.7247917813 kilowatts.
How do you convert horsepower to kilowatts?
One step: multiply the horsepower figure by 0.7456998716. Here that is 64 × 0.7456998716 = 47.72479178 kilowatts.
What is 47.72479178 kilowatts back in horsepower?
Divide by 0.7456998716, or multiply by 1.34102209 — either returns 64 horsepower.
Is 64 hp a lot?
47.7248 kW is 64 mechanical horsepower and 64.89 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 14.1 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.
64 hp in kilowatts — nearby values
| Horsepower | Kilowatts | Unrounded |
|---|---|---|
| 58 hp | 43.250593 | 43.25059255 |
| 59 hp | 43.996292 | 43.99629242 |
| 60 hp | 44.741992 | 44.74199229 |
| 61 hp | 45.487692 | 45.48769217 |
| 62 hp | 46.233392 | 46.23339204 |
| 63 hp | 46.979092 | 46.97909191 |
| 64 hp | 47.724792 | 47.72479178 |
| 65 hp | 48.470492 | 48.47049165 |
| 66 hp | 49.216192 | 49.21619152 |
| 67 hp | 49.961891 | 49.9618914 |
| 68 hp | 50.707591 | 50.70759127 |
| 69 hp | 51.453291 | 51.45329114 |
| 70 hp | 52.198991 | 52.19899101 |
Exact factor: 1 horsepower = 0.745699871582 kilowatts. The row for 64 hp is the value this page is about.