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Dirt calculator · cubic yards

Soil Calculator

How much soil do you need? Pick the soil, measure each area and get the cubic yards.

1 · Material

2 · Two quick choices: depth, then size

2a · Pick a depth
2b · Then measure your areas

Length × width in feet. Add as many areas as you need; we add them up.

Recommended order

6 yd³

of Topsoil

covers 400 sq ft at 4″ · 1 dump truck

400 sq ft × 4 in ÷ 12 ÷ 27 = 4.94 yd³. Plus 15% for settling and spreading, rounded up to a whole yd³.

3 · Get your delivered quote

One cubic yard of topsoil

  • = 27 cubic feet
  • covers 81 sq ft at 4″
  • weighs about 2200 lb
  • a full truck is about 18 yd³
Convert tons ↔ cubic yards →

About this material: Topsoil →

How much does a yard of soil cover?

Cubic yards = area (sq ft) × depth (in) ÷ 12 ÷ 27. Tons = cubic yards × the material’s density. The calculator then adds the buffer for compaction and spreading and rounds up. Tons use our catalog densities: red clay 1.3 t/yd³; baseball clay 1.3 t/yd³.

Swipe the table sideways →

MaterialDepthUsed forCoveragePer 100 sq ft
Topsoil2″Fill low spots and level a lawn.162 sq ft per yd³0.62 yd³
Topsoil4″New lawn or sod. (typical)81 sq ft per yd³1.23 yd³
Topsoil6″New planting bed.54 sq ft per yd³1.85 yd³
Garden Soil Mix6″In-ground beds over loosened soil.54 sq ft per yd³1.85 yd³
Garden Soil Mix12″Most vegetables. (typical)27 sq ft per yd³3.7 yd³
Garden Soil Mix18″Tomatoes and root crops.18 sq ft per yd³5.56 yd³
Compost½″Top-dress a lawn.648 sq ft per yd³0.15 yd³
Compost1″Top-dress beds. (typical)324 sq ft per yd³0.31 yd³
Compost2″Mix into new beds.162 sq ft per yd³0.62 yd³
Fill Dirt6″One compacted 6″ lift.54 sq ft per yd³1.85 yd³
Fill Dirt12″Most low spots and grading. (typical)27 sq ft per yd³3.7 yd³
Fill Dirt2 ftDeep fill, placed in 6–8″ lifts.14 sq ft per yd³7.41 yd³
Red Clay4″Thin compacted cap.62 sq ft per ton1.6 tons
Red Clay6″Compacted base, in 6–8″ layers. (typical)42 sq ft per ton2.41 tons
Red Clay12″Pond liners need 12″ or more.21 sq ft per ton4.81 tons
Baseball Clay1″Resurface worn areas.249 sq ft per ton0.4 tons
Baseball Clay2″Infield top layer. (typical)125 sq ft per ton0.8 tons
Baseball Clay4″Rebuild a mound or plate area.62 sq ft per ton1.6 tons

Before the buffer. Updated November 2026

How much soil for common projects

Swipe the table sideways →

ProjectDepthAreaEstimate
New lawn 1,000 sq ft topsoil4″1,000 sq ft~13 cubic yards
Raised bed 4 ft × 8 ft garden mix12″32 sq ft~1.2 cubic yards
Low-spot fill 500 sq ft6″500 sq ft~9 cubic yards fill dirt
Top dressing 2,000 sq ft1/2″2,000 sq ft~3 cubic yards screened topsoil
Equestrian arena footing refresh3″5,000 sq ft~46 cubic yards red clay

Before the buffer. Measure your own areas above for an order quantity.

Which soil: topsoil, garden mix, compost, fill dirt or clay?

Delivered by dump truck. “From” prices are per yd³ on a full truck, delivery included; the second line is the smallest load.

Soil mistakes to avoid

Confusing topsoil with fill dirt

Topsoil grows plants. Fill dirt is structural subsoil with no organic matter. Buying the wrong one wastes money — fill dirt costs less per yard and does not support a lawn.

Soil layer too shallow

A 1-inch topsoil layer over compacted subgrade fails. Plan 4–6 inches for lawns and 8–12 inches for beds so roots have room to establish.

Pure compost in beds

Compost holds too much water and can burn roots. Cap it at 10–20% of the fill volume. The rest should be garden soil mix or topsoil.

Skipping subgrade prep

Soil on top of compacted construction subsoil drains poorly and stunts roots. Loosen the top 4 inches of subgrade before spreading topsoil.

Forgetting settlement

Soil settles 10–20% in the first month after watering. Order to your finished grade plus the buffer, not the strict math.

Soil calculator questions

Length × Width × Depth ÷ 27 (depth in inches divided by 12). A 1,000 sq ft lawn at 4 inches needs about 13 cubic yards of topsoil.

Need another material? All calculators →

Know how much soil you need? Get your delivered quote.

We’ll quote your 6 yd³ of topsoil, delivery included.