1. What is a Car Ramp Ratio Calculator?

Definition: This calculator determines the ratio of a car ramp's length to its height, which indicates how steep or gentle the ramp is.

Purpose: It helps mechanics, car enthusiasts, and DIYers design safe and functional car ramps for maintenance and storage.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R \) — Ramp ratio (unitless)
• \( L \) — Ramp length (feet)
• \( H \) — Ramp height (feet)

Explanation: The ratio represents how many feet of ramp length are needed for each foot of vertical rise.

3. Importance of Ramp Ratio Calculation

Details: Proper ramp ratio ensures vehicle clearance, safe loading angles, and prevents bottoming out of vehicles.

4. Using the Calculator

Tips: Enter the ramp length and height in feet. Both values must be > 0. A higher ratio indicates a gentler slope.

5. Frequently Asked Questions (FAQ)

Q1: What is a good ramp ratio for cars?
A: Typically 7:1 to 10:1 for standard vehicles, but low-clearance vehicles may need 12:1 or higher.

Q2: How does ratio relate to angle?
A: The ratio is the cotangent of the angle. A 10:1 ratio ≈ 5.7° slope.

Q3: Can I use different units?
A: Yes, as long as both length and height use the same units, the ratio remains valid.

Q4: What's the minimum safe ratio?
A: Never use less than 5:1 for passenger vehicles. 7:1 is recommended for most applications.

Q5: How does this apply to driveway ramps?
A: The same calculation applies for determining the transition angle from street to driveway.