1. What is the Quarter Mile ET Calculator?

The Quarter Mile ET (Elapsed Time) Calculator estimates the time it takes for a vehicle to complete a quarter-mile distance based on horsepower and weight. This calculation is widely used in automotive performance testing and drag racing.

2. How Does the Calculator Work?

The calculator uses the Quarter Mile ET equation:

Where:

• \( ET \) — Quarter Mile Elapsed Time (seconds)
• \( HP \) — Horsepower (hp)
• \( Weight \) — Vehicle Weight (lbs)

Explanation: The equation calculates elapsed time based on the power-to-weight ratio, with the cube root relationship reflecting the diminishing returns of additional power.

3. Importance of Quarter Mile ET Calculation

Details: Quarter mile time is a standard performance metric in automotive testing, providing a quick comparison of vehicle acceleration capabilities and overall performance potential.

4. Using the Calculator

Tips: Enter horsepower in hp and weight in lbs. Both values must be positive numbers. The calculator provides an estimated quarter mile elapsed time in seconds.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation?
A: This provides a theoretical estimate. Actual performance depends on traction, transmission, aerodynamics, and driving skill.

Q2: What is a good quarter mile time?
A: Under 12 seconds is considered fast, under 10 seconds is very fast, and under 8 seconds is professional drag racing territory.

Q3: Does this account for drivetrain loss?
A: No, this calculation uses engine horsepower. For wheel horsepower, results will be more accurate to actual performance.

Q4: Can I use this for motorcycles?
A: Yes, the formula works for any vehicle, though traction limitations may affect actual performance differently.

Q5: What factors affect quarter mile time besides power and weight?
A: Traction, gearing, aerodynamics, tire type, launch technique, and weather conditions all significantly impact actual performance.