Horsepower to Weight Ratio Calculator
Enter horsepower and weight to get the performance ratio.
Your numbers
Your results
Pounds per horsepower
Pounds per horsepower
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Horsepower per US ton (2,000 lb)
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Horsepower per 1,000 lb
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Watts per kilogram
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Kilograms per horsepower
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Horsepower to Weight Ratio Calculator by TheCalcTools
How the Horsepower to Weight Ratio Calculator works
Enter the engine power and the vehicle weight, in pounds or kilograms.
Add the driver and fuel for a realistic ratio.
The calculator converts to pounds and kilograms and gives several common ratios.
The formula
Power-to-weight = power ÷ weight1 hp = 745.7 W
Worked example
Using the default values shown in the calculator:
| Horsepower | 300 |
|---|---|
| Vehicle weight | 3500 |
| Weight unit | Pounds (lb) |
| Driver and fuel (same unit) | 200 |
- 300 hp and 3,700 lb with driver: 3,700 ÷ 300 = 12.33 lb per hp.
- That is 162 hp per ton and 133 W per kilogram.
Result:
| Pounds per horsepower | 12.33 |
|---|---|
| Horsepower per US ton (2,000 lb) | 162 |
| Horsepower per 1,000 lb | 81 |
| Watts per kilogram | 133 |
| Kilograms per horsepower | 5.59 |
Frequently asked questions
What is a good power to weight ratio?
Family cars are around 60 to 100 hp per ton. Sports cars are 150 to 250 and superbikes are over 400.
Does it predict 0 to 60?
It correlates, but traction, gearing and aerodynamics also matter.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.