Horsepower Calculator
Calculate your vehicle's horsepower based on weight and quarter-mile time. Accurate, fast, and completely free!
Calculation Result
Average Car
120-180 HP
Sports Car
300-500 HP
Supercar
500-800 HP
Hypercar
800+ HP
Frequently Asked Questions
Our calculator uses proven physics formulas to estimate horsepower. It's highly accurate for rear-wheel drive vehicles but may have slight variations for all-wheel or front-wheel drive cars due to drivetrain losses.
You need two measurements: your vehicle's weight (including driver and fuel) and your quarter-mile elapsed time. Both should be as accurate as possible for best results.
Yes, our calculator supports both imperial (lbs, seconds) and metric (kg, seconds) units. Simply select your preferred unit system.
Manufacturers typically report brake horsepower (engine output), while our calculator estimates wheel horsepower (power reaching the wheels). There's typically a 10-20% difference due to drivetrain losses.