Home/Mechanical & performance/Weight-to-Power Ratio Calculator
Mechanical & performance
Weight-to-Power Ratio Calculator
How many kilograms each horsepower has to move: kg/hp and kg/kW, the inverse of power-to-weight.
Formula
kW/kg ratio = Power (kW) / Vehicle weight (kg) (kg)
Assumptions
How many kilograms each horsepower has to move: kg/hp and kg/kW, the inverse of power-to-weight.
How to read it
The fewer kilograms per horsepower, the harder the car accelerates. Benchmarks: city car 12–15 kg/hp, saloon 8–10, sports car 4–6, supercar < 3. Use real laden weight (people, luggage), not just kerb weight.