1. What is the McGill Compost Formula?

The McGill compost formula calculates the volume of compost needed in gallons based on the area to be covered and the desired depth. The factor 7.48 converts cubic feet to gallons.

2. How Does the Calculator Work?

The calculator uses the McGill compost formula:

Where:

• \( Area \) — Area to be covered in square feet
• \( Depth \) — Desired depth of compost in feet
• \( 7.48 \) — Conversion factor (cubic feet to gallons)

Explanation: The formula calculates the cubic feet of compost needed and converts it to gallons.

3. Importance of Volume Calculation

Details: Accurate volume calculation ensures you purchase the right amount of compost for your project, avoiding waste or shortage.

4. Using the Calculator

Tips: Enter area in square feet and depth in feet. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why multiply by 7.48?
A: There are 7.48 gallons in one cubic foot, so this converts the volume from cubic feet to gallons.

Q2: What's a typical compost depth?
A: For most applications, 2-4 inches (0.17-0.33 feet) is recommended for top dressing, while 6-12 inches (0.5-1 foot) may be needed for new beds.

Q3: How do I measure irregular areas?
A: Break the area into regular shapes (rectangles, circles), calculate each separately, then sum the results.

Q4: Does this work for other materials?
A: Yes, this formula works for any material where you need to calculate volume in gallons from area and depth.

Q5: How accurate is this calculation?
A: The calculation is mathematically precise, but actual coverage may vary slightly based on compaction and moisture content.