1. What is a Driveway Gravel Calculator?

Definition: This calculator estimates the volume of gravel needed for a concrete driveway based on its dimensions.

Purpose: It helps homeowners and contractors determine how much gravel is required for proper driveway base preparation.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Volume of gravel (cubic yards)
• \( L \) — Length of driveway (feet)
• \( W \) — Width of driveway (feet)
• \( D \) — Depth of gravel (feet)
• 27 — Conversion factor (cubic feet per cubic yard)

Explanation: The dimensions are multiplied to get cubic feet, then divided by 27 to convert to cubic yards.

3. Importance of Proper Gravel Base

Details: A proper gravel base ensures drainage, prevents frost heave, and provides a stable foundation for the concrete.

4. Using the Calculator

Tips: Measure your driveway dimensions accurately. Typical gravel depth is 4-6 inches (0.33-0.5 feet) for residential driveways.

5. Frequently Asked Questions (FAQ)

Q1: How deep should gravel be under a concrete driveway?
A: Typically 4-6 inches for residential driveways, 6-8 inches for heavy vehicles.

Q2: What type of gravel is best for driveways?
A: Crushed stone (3/4" minus) is ideal as it compacts well and provides good drainage.

Q3: Should I add extra gravel for compaction?
A: Yes, add 10-15% more to account for compaction, especially for thicker layers.

Q4: How do I measure an irregularly shaped driveway?
A: Break it into rectangular sections, calculate each separately, then sum the volumes.

Q5: Does this include the concrete thickness?
A: No, this calculates only the gravel base volume. Concrete is added on top.

Driveway Gravel Calculator© - All Rights Reserved 2025