57 kilowatts works out to 76.43825911 hp. The calculation is 57 × 1.34102209, and the unrounded result is 76.4382591069 horsepower, which is the number to use if this feeds into anything else.
57 kW is 76.44 mechanical horsepower and 77.5 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 11.8 seconds to deliver, which is a floor rather than a real figure because it ignores drag and traction limits.
The result sits 1.438 hp past 75 hp, so if you need a round figure to quote, 75 hp is the honest nearest one. Plenty of people do this in their head: multiply by 1.3 instead of using the exact factor 1.34102209. At 57 that shortcut gives 74.1 horsepower, off by 2.338 horsepower or about 3.06%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
The formula
57 kW- The quantity being converted
1.34102209- Exact horsepower in one kilowatt
76.43825911 hp- The converted result
How it works, step by step
- Start with 57 kilowatts.
- Scale it by 1.34102209 — that is how many horsepower fit in a single kilowatt.
- The product is 76.4382591069 horsepower.
- Going the other way, divide rather than multiply — 76.43825911 hp ÷ 1.34102209 brings you back to 57 kW.
Worked examples
Working it through
57 kW × 1.34102209 = 76.4382591069 hp. One multiplication, with no rounding until the value reaches the screen.
Checking it backwards
Run it in reverse — 76.43825911 hp ÷ 1.34102209 = 57 kW. Matching the input you started from is the proof the direction is right.
How to read your score
Frequently asked questions
What is 57 kilowatts in horsepower?
The answer is 76.43825911 hp — or 76.4382591069 horsepower before any rounding.
How do you convert kilowatts to horsepower?
Multiply by 1.34102209. So 57 × 1.34102209 = 76.43825911 horsepower. The factor comes from a definition rather than a measurement, so it never changes.
What is 76.43825911 horsepower back in kilowatts?
It goes back to 57 kilowatts. The reciprocal of the factor is 0.7456998716, so multiplying by that works just as well as dividing.
How much is 57 kW in practice?
57 kW is 76.44 mechanical horsepower and 77.5 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 11.8 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 kilowatt?
The rating unit for motors, EV chargers and solar arrays.
What is a horsepower?
Mechanical horsepower, defined by James Watt as 550 foot-pounds per second.
57 kW in horsepower — nearby values
| Kilowatts | Horsepower | Unrounded |
|---|---|---|
| 51 kW | 68.392127 | 68.39212657 |
| 52 kW | 69.733149 | 69.73314866 |
| 53 kW | 71.074171 | 71.07417075 |
| 54 kW | 72.415193 | 72.41519284 |
| 55 kW | 73.756215 | 73.75621493 |
| 56 kW | 75.097237 | 75.09723702 |
| 57 kW | 76.438259 | 76.43825911 |
| 58 kW | 77.779281 | 77.7792812 |
| 59 kW | 79.120303 | 79.12030329 |
| 60 kW | 80.461325 | 80.46132538 |
| 61 kW | 81.802347 | 81.80234747 |
| 62 kW | 83.14337 | 83.14336955 |
| 63 kW | 84.484392 | 84.48439164 |
Exact factor: 1 kilowatt = 1.3410220896 horsepower. The row for 57 kW is the value this page is about.