Horsepower-to-Weight Ratio Calculator
Calculate your vehicle's power-to-weight ratio in HP per ton, pounds per HP, and HP per liter. Compare against performance benchmarks.
Power-to-Weight Ratio
171.4 HP/ton
Pounds per HP
11.7 lb/HP
HP per Liter
52.6 HP/L
kW per kg
0.141
Vehicle Class Reference
| Class | HP/ton | lb/HP |
|---|---|---|
| Economy Car | 80–120 | 20–25 |
| Family Sedan | 120–180 | 14–17 |
| Sports Car | 180–280 | 9–12 |
| Supercar | 350–550 | 5–7 |
| Hypercar | 600+ | <4 |
💡 How to Use the Horsepower-to-Weight Ratio Calculator
Power-to-Weight Ratio Explained
Power-to-weight ratio is the most meaningful performance metric — it determines acceleration, hill-climbing ability, and lap times better than raw horsepower alone. A lighter car with less power can outperform a heavier car with more power.
Formula: HP/ton = HP ÷ (Weight in lbs ÷ 2,000) | lb/HP = Weight ÷ HP
Real-World Comparisons
| Vehicle | HP | Weight | lb/HP |
|---|---|---|---|
| Mazda MX-5 | 181 | 2,341 lbs | 12.9 |
| BMW M3 | 473 | 3,840 lbs | 8.1 |
| Corvette C8 | 495 | 3,366 lbs | 6.8 |
| Porsche 911 Turbo S | 640 | 3,636 lbs | 5.7 |
| Bugatti Chiron | 1,500 | 4,400 lbs | 2.9 |