Compost Calculator
Calculate how much compost to add to your garden based on area size and recommended application depth.
How It Works
Enter your garden area and desired compost layer thickness. The calculator returns cubic yards needed. One cubic yard covers 162 sq ft at 2 inches deep.
Formula
Cubic Yards = (Area sq ft x Depth in) / 324
Frequently Asked Questions
How much compost should I add per year?
Apply 1-3 inches of compost annually to garden beds. For new beds or depleted soil, 3-4 inches is recommended. Work it into the top 6-8 inches of soil.
Can I add too much compost?
Yes. Excessive compost can lead to nutrient imbalances, especially phosphorus buildup. Stick to 1-3 inches per year unless a soil test indicates deficiency.