1. What is a Gravel Tonnage Calculator?

Definition: This calculator estimates the weight of gravel needed based on area, depth, and material density.

Purpose: It helps construction professionals and DIYers determine how much gravel is required for projects like driveways, walkways, or foundations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Gravel tonnage (tons)
• \( A \) — Area (square feet)
• \( D \) — Depth (feet)
• \( \rho \) — Density (pounds per cubic foot, typically 100-130)

Explanation: The formula calculates volume in cubic feet, converts to weight using density, then converts pounds to tons (2000 lbs = 1 ton).

3. Importance of Gravel Calculation

Details: Accurate gravel calculation ensures proper project planning, cost estimation, and material delivery.

4. Using the Calculator

Tips: Enter the area in square feet, depth in feet, and density (default 100 lb/ft³). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical gravel density?
A: Most gravel ranges from 100-130 lb/ft³. Lighter gravel is about 100, while dense crushed stone may be 130.

Q2: How do I measure the area?
A: For rectangular areas: length × width. For circular areas: π × radius². For irregular shapes, divide into smaller rectangles.

Q3: What depth should I use?
A: Typical depths: 2-4 inches (0.17-0.33 ft) for landscaping, 4-6 inches (0.33-0.5 ft) for driveways.

Q4: Does this include compaction?
A: No, consider adding 10-20% more material if significant compaction is expected.

Q5: How do I convert inches to feet for depth?
A: Divide inches by 12 (e.g., 3 inches = 0.25 feet).