Calchy.

642 HP to kW

642 HP equals 478.74 kW.

Formula: HP × 0.7457 = kW

642 HP =
478.74kW
Metric HP (PS)
650.9 PS
Watts
478,739.4 W

642 HP is hypercar / race-engine territory. This level requires specialised engineering and fuel management.

Computed to 3 decimal places using factor 0.7457. For engineering or safety-critical uses verify against a calibrated reference.

Reference table

HP to kW near 642

horsepower (HP)kilowatts (kW)
612 HP456.37 kW
617 HP460.1 kW
622 HP463.83 kW
627 HP467.55 kW
632 HP471.28 kW
637 HP475.01 kW
642 HP478.74 kW
647 HP482.47 kW
652 HP486.2 kW
657 HP489.92 kW
662 HP493.65 kW
667 HP497.38 kW
672 HP501.11 kW
By use case

Popular HP values

Economy car
city / commuter
Sport car
hot hatch / sports sedan
Supercar
flagship performance
Hypercar
extreme performance
Other HP values
Try any value
Interactive HPkW converter

Enter any value, get instant results across all units.

Open converter →
FAQ

Frequently asked

How many kW is 642 HP?
642 mechanical horsepower = 478.74 kW. The exact factor is 1 HP = 0.7457 kW.
What is 642 HP in PS (metric horsepower)?
642 HP = 650.9 PS. Metric HP (PS/CV) is slightly smaller than mechanical HP: 1 PS = 0.9863 HP.
How do I convert 642 HP to kW without a calculator?
Multiply HP by 0.746 for a close approximation: 642 × 0.746 = 478.93 kW. The exact answer is 478.74 kW.
What kind of engine has 642 HP?
642 HP is high-performance / supercar territory — Porsche 911 Turbo, Chevrolet Corvette, BMW M5, or tuned builds.
More conversion tools