Topsoil for a 20×20 ft Garden at 6 Inches Deep
A 20×20 ft vegetable garden at 6 inches of topsoil requires approximately 7.41 cubic yards.
How to use this tool
- Enter the area dimensions in feet and the desired soil depth in inches.
- The calculator returns cubic feet, cubic yards, and equivalent 40 lb bags.
- Order bulk delivery for areas over 2 cubic yards — it's more economical.
A new 20×20 vegetable garden needs at least 6 inches of quality topsoil — that's about 7.4 cubic yards.
Frequently asked questions
- How much topsoil do I need?
- Multiply length × width (ft²) by depth in feet (inches ÷ 12). Divide by 27 for cubic yards. A 40 lb bag holds roughly 0.75 cubic feet.
- How deep should topsoil be for a lawn?
- A minimum of 4–6 inches of good topsoil is recommended for healthy grass. For raised vegetable beds, aim for 12 inches or more.