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Power-to-weight ratio calculator (kW per tonne)

Enter the power and the kerb weight — or pick a car from our catalog — to get its power-to-weight ratio and compare it with real cars and their measured 0–100 km/h times.

Try a car from our catalog:
Search every model in our catalog by brand, model, generation or year - or leave it empty and type your own figures.

Result

Power-to-weight ratio237.3 kW/t

Prefilled: Ferrari F430

PS per tonne
322.7 PS/t
hp per tonne
318.2 hp/t
Kilograms per kW
4.21 kg/kWlower is livelier
Kilograms per PS
3.10 kg/PS
Power
360 kW (489 PS)1,517 kg kerb weight

8 kW/t978 kW/t

Higher than 92% of the 1097 versions in our catalog with power and kerb weight.

Closest cars in our catalog

  1. Ferrari F430 · F430237 kW/t
  2. Audi R8 II (Type 4S) · V10 5.2 FSI quattro234 kW/t · 0–100 in 3.5 s
  3. Nissan GT-R R35 · GT-R 3.8 V6 twin-turbo235 kW/t
  4. Nissan GT-R (R35) · 419 kW (570 PS)235 kW/t
  5. Chevrolet Corvette C2 · 6.5 317 kW (431 PS) Coupe238 kW/t
  6. Audi R8 I (Type 42) · 5.2 FSI quattro238 kW/t · 0–100 in 3.9 s

0–100 km/h: manufacturer figures from our catalog, where known. We do not estimate acceleration.

How the power-to-weight ratio is calculated

  • kW per tonne = power in kW ÷ kerb weight in tonnes
  • PS per tonne = kW per tonne × 1.36; hp per tonne = kW per tonne × 1.341
  • kg per kW = kerb weight ÷ power — the lower, the livelier

Kerb weight is the weight of the car ready to drive (with fluids and, depending on the standard, a part-full tank) but without passengers or luggage. A full car with four people can weigh 300 kg more, which lowers the ratio noticeably.

Why we do not estimate 0–100 km/h

Acceleration depends on far more than power and weight: traction (front, rear or all-wheel drive), tyres, gearing, launch control and how the power is delivered. Instead of guessing, we show cars from our catalog with a similar ratio and their manufacturer-quoted 0–100 km/h times.

Frequently asked questions

What is a good power-to-weight ratio?

Compare it with real cars: the result shows where your figure ranks among all versions in our catalog that have both power and kerb weight, and lists the closest ones.

Is kW per tonne the same as W per kg?

Yes. 1 kW per tonne equals 1 W per kg, so 100 kW/t is 100 W/kg.

Can I calculate 0–100 km/h from power and weight?

Only roughly — traction, gearing and tyres matter as much. We therefore show measured manufacturer times of cars with a similar ratio rather than an estimate.