1. What is the 1/4 Mile ET Equation?

The 1/4 Mile ET (Elapsed Time) equation estimates the time it takes for a vehicle to complete a quarter-mile distance based on its weight and horsepower. This formula provides a theoretical estimation of a vehicle's acceleration performance.

2. How Does the Calculator Work?

The calculator uses the 1/4 Mile ET equation:

Where:

• \( Weight \) — Vehicle weight in pounds (lb)
• \( HP \) — Engine horsepower (HP)

Explanation: The equation calculates the cube root of the weight-to-power ratio and multiplies it by the constant 6.290 to estimate the quarter-mile elapsed time.

3. Importance of 1/4 Mile ET Calculation

Details: Quarter-mile time is a standard performance metric in automotive racing and enthusiast communities. It helps compare vehicle acceleration capabilities and evaluate modifications.

4. Using the Calculator

Tips: Enter vehicle weight in pounds and engine horsepower. Both values must be valid positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this estimation?
A: This provides a theoretical estimation. Actual performance may vary based on traction, transmission, aerodynamics, and other factors.

Q2: What is a good 1/4 mile time?
A: Times vary by vehicle type. Sports cars typically range 12-14 seconds, supercars 10-12 seconds, and dedicated dragsters can achieve under 7 seconds.

Q3: Does this account for drivetrain losses?
A: No, this formula uses raw horsepower. For more accurate estimates, use wheel horsepower which accounts for drivetrain losses.

Q4: Can this be used for electric vehicles?
A: Yes, but electric vehicles often have different power delivery characteristics that may affect actual performance.

Q5: What other factors affect quarter-mile times?
A: Traction, gearing, shift speed, aerodynamics, temperature, and altitude all significantly impact actual quarter-mile performance.