Topsoil Calculator
Enter area and depth to estimate topsoil needs.
$
Depth(ft) = Depth(in) / 12
Volume(ft3) = Length * Width * Depth(ft)
Cubic Yards = Volume / 27
20*15 ft at 4 in -> 20*15*0.333 / 27 ~= 3.70 yd3.
How deep should topsoil be?
Lawns: 2–4 inches. Raised beds: 8–12 inches. Vegetable beds often benefit from deeper, loamier mixes.
How many yards do I need?
Cubic yards = (Length × Width × Depth(ft)) ÷ 27. The calculator does this for you once you enter dimensions.
Should I add compost?
Many gardeners blend compost (10–30%) for nutrients and structure. Adjust depth accordingly.
Will soil settle?
Yes. Add 5–10% for settling, especially in new beds and after heavy rain/irrigation.
How much topsoil do I need?
Lawns: 2–4 inches. Raised beds: 8–12 inches. Calculate cubic yards and consider compaction.
📐 Formula
Depth(ft) = Depth(in) / 12
Volume(ft3) = Length * Width * Depth(ft)
Cubic Yards = Volume / 27
📝 Example Calculation
20*15 ft at 4 in -> 20*15*0.333 / 27 ~= 3.70 yd3.
❓ Frequently Asked Questions
How deep should topsoil be?▼
Lawns: 2–4 inches. Raised beds: 8–12 inches. Vegetable beds often benefit from deeper, loamier mixes.
How many yards do I need?▼
Cubic yards = (Length × Width × Depth(ft)) ÷ 27. The calculator does this for you once you enter dimensions.
Should I add compost?▼
Many gardeners blend compost (10–30%) for nutrients and structure. Adjust depth accordingly.
Will soil settle?▼
Yes. Add 5–10% for settling, especially in new beds and after heavy rain/irrigation.
How much topsoil do I need?▼
Lawns: 2–4 inches. Raised beds: 8–12 inches. Calculate cubic yards and consider compaction.