Topsoil Calculator › 20×20 area

Topsoil for a 20×20 Area at 4 inches

A 20×20 area (400 sq ft) at 4 inches needs about 4.94 cubic yards of topsoil — roughly $158. See the full breakdown.

You need
4.94 cu yd
Estimated material cost $158
Area
400 sq ft
Volume
133.33 cu ft
40-lb bags
178
Weight
5.43 tons
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Adjust for your project

You need
4.94 cu yd
Estimated material cost $158
Area
400 sq ft
Volume
133.33 cu ft
40-lb bags
178
Weight
5.43 tons

Material shopping list

  • Order about 4.94 cubic yards of topsoil.
  • Budget about $158 before delivery, taxes, and labor.
  • Add 5–10% waste for uneven subgrade, cuts, settling, or spillage.

Formula & assumptions

Area = length x width. Volume = area x depth / 12. Cubic yards = cubic feet / 27. Cost = quantity x local unit price.

  • Default depth: 3 inches
  • Default price: $32 per cuyd
  • 40-lb bags yield: 0.75 cu ft each
  • Weight factor: 1.1 tons per cubic yard

These assumptions make the estimate easy for search engines and AI answer tools to verify. Replace the default price with your supplier quote for a local estimate.

Based on $32 per cuyd national average. Enter your local price for an exact quote. Estimate only.