Power-to-Weight Ratio Calculator
HP/ton, kW/kg — and a 0-100 km/h estimate.
Power-to-weight
200.0 hp/ton(0.149 kW/kg)
- hp/lb
- 0.0907
- Power (hp)
- 300.0
- Weight (kg)
- 1500
- Rough 0-100 km/h
- ~7.3 s
Spirited family car. Capable without being scary.
About this calc
The single best predictor of acceleration. Enter power and weight; get the ratio in multiple units plus a rough 0-100 km/h estimate.
FAQ
- Why is power-to-weight more useful than just horsepower?
- Because the same engine in a lighter car accelerates harder. A 300 hp Miata would dust a 300 hp truck. P/W is what actually predicts performance.
- Should I include driver weight?
- Yes — add 75-80 kg for the driver. Manufacturer specs quote kerb weight (empty), but real-world acceleration happens with a body in the seat.
- How accurate is the 0-100 estimate?
- Rough — within a second or two for typical RWD/AWD cars. Launch technique, traction, and transmission type (DCT vs manual vs auto) can easily shift the real number.