71 horsepower is 52.94469088 kW. The exact arithmetic is 71 × 0.7456998716 = 52.9446908823 kilowatts, using the defined factor rather than a rounded one, so this matches what a calibrated instrument would give you.
52.9447 kW is 71 mechanical horsepower and 71.98 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 12.8 seconds to deliver, which is a floor rather than a real figure because it ignores drag and traction limits.
The result sits 2.055 kW short of 55 kW, so if you need a round figure to quote, 55 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 71 that shortcut gives 54.615385 kilowatts, off by 1.671 kilowatts or about 3.16%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
The formula
71 hp- The quantity being converted
0.7456998716- Exact kilowatts in one horsepower
52.94469088 kW- The converted result
How it works, step by step
- Take the horsepower value, 71.
- Apply the defined factor: one horsepower is 0.7456998716 kilowatts, so multiply by that.
- Result: 52.9446908823 kilowatts.
- Going the other way, divide rather than multiply — 52.94469088 kW ÷ 0.7456998716 brings you back to 71 hp.
Worked examples
The calculation
Because this is a straight proportion, 71 hp × 0.7456998716 = 52.9446908823 kW — no offset, no second term, nothing else to account for.
Proving it both ways
Divide the answer back: 52.94469088 kW ÷ 0.7456998716 returns 71 hp. If a converter fails this test it has inverted the factor, which is the single most common conversion error there is.
How to read your score
Frequently asked questions
What is 71 horsepower in kilowatts?
It comes to 52.94469088 kW. The unrounded figure is 52.9446908823 kilowatts, if you need to carry it forward.
How do you convert horsepower to kilowatts?
Multiply by 0.7456998716. So 71 × 0.7456998716 = 52.94469088 kilowatts. The factor comes from a definition rather than a measurement, so it never changes.
What is 52.94469088 kilowatts back in horsepower?
Divide by 0.7456998716, or multiply by 1.34102209 — either returns 71 horsepower.
What does 71 hp actually look like?
52.9447 kW is 71 mechanical horsepower and 71.98 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 12.8 seconds to deliver, which is a floor rather than a real figure because it ignores drag and traction limits. The table lower down places it beside its neighbours so you can see where it sits.
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.
71 hp in kilowatts — nearby values
| Horsepower | Kilowatts | Unrounded |
|---|---|---|
| 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 |
| 71 hp | 52.944691 | 52.94469088 |
| 72 hp | 53.690391 | 53.69039075 |
| 73 hp | 54.436091 | 54.43609063 |
| 74 hp | 55.18179 | 55.1817905 |
| 75 hp | 55.92749 | 55.92749037 |
| 76 hp | 56.67319 | 56.67319024 |
| 77 hp | 57.41889 | 57.41889011 |
Exact factor: 1 horsepower = 0.745699871582 kilowatts. The row for 71 hp is the value this page is about.