1. What is a Concrete Gravel Calculator?

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

Purpose: It helps determine how much gravel is required for foundations, driveways, or other concrete construction projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula calculates volume (A × D), converts to weight (× ρ), then converts pounds to tons (/2000).

3. Importance of Gravel Weight Calculation

Details: Accurate gravel weight estimation ensures proper project planning, material ordering, and cost control for concrete projects.

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 has a density between 100-130 lb/ft³. 100 lb/ft³ is a common default value.

Q2: How do I measure the area?
A: For rectangular areas, multiply length × width. For circular areas, use π × radius².

Q3: What depth should I use?
A: Typical gravel base depths are 4-6 inches (0.33-0.5 ft) for patios, 6-12 inches (0.5-1 ft) for driveways.

Q4: Why divide by 2000?
A: There are 2000 pounds in a ton, so this converts the weight from pounds to tons.

Q5: Does this include compaction factor?
A: No, consider adding 10-15% to the calculated weight for compaction if needed.