Calculate garden soil, compost, or raised bed mix volume in cubic yards and bags for flower beds, vegetable gardens, and garden borders.
🌱 Garden Soil Calculator
Cubic Feet
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Cubic Yards
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1.5cu ft Bags
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💡 Pro Tip
Avoid using 100% native soil in raised beds. It compacts over time, restricting root growth and drainage. A blended mix with compost and aeration material produces much better yields.
Frequently Asked Questions
Q: How much garden soil do I need for a raised bed?
For a 4x8 raised bed that is 12 inches deep: 4 × 8 × 1 = 32 cubic feet ÷ 27 = 1.18 cubic yards. Most garden bags cover 0.75 cubic feet each, so you would need about 43 bags.
Q: What is the best soil mix for a raised bed?
The classic Mel's Mix ratio is 1/3 peat moss or coconut coir, 1/3 coarse vermiculite, and 1/3 blended compost. This creates light, well-draining soil ideal for raised beds.
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