1. What is a Mile Time Speed Calculator?

Definition: This calculator estimates a vehicle's 1/4-mile trap speed based on its horsepower and weight.

Purpose: It helps automotive enthusiasts and professionals predict quarter-mile performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( MPH \) — 1/4-mile trap speed (miles per hour)
• \( HP \) — Engine horsepower
• \( W \) — Vehicle weight (pounds)

Explanation: The formula calculates the power-to-weight ratio's cube root and scales it to typical drag racing speeds.

3. Importance of Trap Speed Calculation

Details: Trap speed is a key performance metric in drag racing, indicating a vehicle's power and efficiency.

4. Using the Calculator

Tips: Enter the engine's horsepower and vehicle's curb weight (including driver). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation?
A: It provides a theoretical estimate. Actual speeds vary based on traction, aerodynamics, and drivetrain efficiency.

Q2: Should I use wheel horsepower or crank horsepower?
A: For most accurate results, use wheel horsepower (measured at the wheels).

Q3: Does this account for driver weight?
A: No, include driver and passenger weight in the total weight input.

Q4: What's a good trap speed?
A: Street cars typically run 85-110 mph, while purpose-built dragsters can exceed 330 mph.

Q5: Can I calculate ET (elapsed time) from this?
A: No, this only calculates trap speed. ET depends on launch and acceleration characteristics.