Calculate quarter mile time, trap speed, and 60 feet time based on horsepower, weight, and drivetrain
Quarter mile drag racing is a straight-line acceleration contest where vehicles compete to cover 1,320 feet (402 meters) in the shortest time possible. The elapsed time (ET) and trap speed at the finish line are the primary performance metrics used to evaluate a vehicle's acceleration capabilities.
This calculator estimates your vehicle's quarter mile performance based on horsepower, weight, and drivetrain configuration. While actual track results depend on many factors including driver skill, tire grip, and track conditions, these calculations provide a solid baseline for expected performance.
The total time from start to finish line. Professional drag racers achieve times under 4 seconds, while typical performance cars run 12-15 seconds. Street cars generally range from 14-18 seconds.
The speed measured at the finish line, typically over the final 66 feet. Trap speed is a better indicator of horsepower than ET, as it's less affected by launch technique and traction.
The time to cover the first 60 feet from the starting line. This metric measures launch effectiveness and is crucial for overall ET. Good 60-foot times range from 1.5-2.0 seconds for street cars.
Horsepower divided by vehicle weight. Higher ratios indicate better acceleration potential. Sports cars typically have ratios of 0.10-0.15 hp/lb, while supercars exceed 0.20 hp/lb.
| Category | ET Range | Trap Speed | Examples |
|---|---|---|---|
| Pro/Super Car | Under 10s | 140+ mph | Top Fuel, Pro Stock, Bugatti Chiron |
| High Performance | 10-12s | 120-140 mph | Porsche 911 Turbo, Corvette Z06 |
| Performance | 12-14s | 105-120 mph | Mustang GT, Camaro SS, Challenger R/T |
| Sporty | 14-16s | 90-105 mph | WRX, GTI, Civic Si |
| Standard | 16s+ | Under 90 mph | Economy cars, family sedans |
RWD vehicles typically have the best power transfer efficiency (100%), followed by FWD (95%) and AWD (92%). However, AWD provides superior traction for launches, especially in high-horsepower applications.
Tire compound, temperature, and pressure dramatically affect 60-foot times and overall ET. Drag radials or slicks can improve times by 0.5-1.5 seconds compared to street tires.
Proper launch RPM, clutch engagement, and throttle control are critical. A poor launch can cost 1-2 seconds in ET even with adequate power.
Temperature, humidity, and altitude affect engine power and air density. Hot, humid, or high-altitude conditions reduce performance, while cool, dry, sea-level conditions are optimal.
Removing 100 lbs typically improves ET by 0.1-0.15 seconds. Focus on removing weight from the front and top of the vehicle for better weight transfer during launch.
Adding 50 horsepower can improve ET by 0.2-0.3 seconds. Common modifications include cold air intakes, exhaust systems, tuning, forced induction, and engine internals.
Adjustable shocks, launch control, and proper suspension geometry help transfer weight to the rear wheels during launch, improving traction and 60-foot times.
Shorter gear ratios improve acceleration but may require an extra shift. Optimal gearing keeps the engine in its power band throughout the run.
Vehicle: 2024 Mustang GT
Horsepower: 480 HP
Weight: 3,800 lbs
Drivetrain: RWD
Results: Quarter mile time of approximately 12.3 seconds at 116 mph trap speed with a 1.8-second 60-foot time.
Vehicle: Porsche 911 Turbo S
Horsepower: 640 HP
Weight: 3,640 lbs
Drivetrain: AWD
Results: Quarter mile time of approximately 10.5 seconds at 130 mph trap speed with a 1.6-second 60-foot time.
Vehicle: Subaru WRX STI (Modified)
Horsepower: 400 HP
Weight: 3,400 lbs
Drivetrain: AWD
Results: Quarter mile time of approximately 12.8 seconds at 110 mph trap speed with a 1.7-second 60-foot time.