The Cubic Yard

How Much Topsoil Do I Need?

4 min read · Updated June 2026

81 sq ft
1 yard @ 4"
new lawn
162 sq ft
1 yard @ 2"
top-dress
27 sq ft
1 yard @ 12"
raised bed
36 bags
= 1 yard
40 lb bags
⚠Order 10% extra to account for settling, waste, and irregular shapes.
ℹFormula: Length × Width × Depth (in.) ÷ 324 = cubic yards. See methodology →

Coverage Chart by Depth

Depth1 Yard CoversTypical Use
1 inch324 sq ftTop-dressing lawn
2 inches162 sq ftLight lawn renovation
3 inches108 sq ftGarden bed refresh
4 inches81 sq ftNew lawn (min. recommended)
6 inches54 sq ftNew lawn / garden bed
8 inches40 sq ftRaised bed (shallow)
12 inches27 sq ftRaised bed (standard)

Common Project Estimates

Top-dress a 1,000 sq ft lawn (1 inch)
Bulk (yards)
3.1 yards
Bags (40 lb)
111 bags
💡 Light renovation, no seeding needed
New 500 sq ft lawn from seed (4 inches)
Bulk (yards)
6.2 yards
Bags (40 lb)
222 bags
💡 Order 7 yards (10% buffer)
10×20 ft flower bed (6 inches)
Bulk (yards)
3.7 yards
Bags (40 lb)
133 bags
💡 Mix with compost for nutrients
4×8 ft raised bed (12 inches)
Bulk (yards)
1.2 yards
Bags (40 lb)
43 bags
💡 Use blended mix, not straight topsoil
4×8 ft raised bed (8 inches)
Bulk (yards)
0.8 yards
Bags (40 lb)
29 bags
💡 Minimum depth for most vegetables

Bulk vs Bagged — Which to Buy?

For any project over 50 sq ft, bulk topsoil delivered by the yard is significantly cheaper. Here's a real comparison for a 500 sq ft lawn at 4 inches (6.2 yards):

Bulk topsoil
6.2 yards × $30 = $186
Delivery: $50–$75
Total: ~$240
Bagged (40 lb bags)
222 bags × $5 = $1,110
No delivery needed
Total: ~$1,110

Bags cost 4–5x more for large areas. Only use bags for fill-in work under 0.5 yards.

Frequently Asked Questions

How much topsoil do I need for a new lawn?

For a new lawn from seed, spread 4–6 inches of topsoil over existing soil. At 4 inches, one cubic yard covers about 81 sq ft. At 6 inches, one yard covers 54 sq ft.

How much topsoil do I need for a raised bed?

Fill a raised bed with 8–12 inches of a blended mix (60% topsoil, 30% compost, 10% perlite). A standard 4×8 ft raised bed at 12 inches needs about 1.2 cubic yards.

How many bags of topsoil do I need?

A standard 40 lb bag contains about 0.75 cubic feet. You need 36 bags per cubic yard. For large projects, bulk topsoil delivered by the yard is far cheaper than bags.

How much does a cubic yard of topsoil cover?

One cubic yard covers approximately: 324 sq ft at 1 inch deep, 162 sq ft at 2 inches, 108 sq ft at 3 inches, 81 sq ft at 4 inches, 54 sq ft at 6 inches, or 27 sq ft at 12 inches.

Is it cheaper to buy topsoil in bulk or in bags?

Bulk is always cheaper for areas over 50 sq ft. Bulk topsoil costs $15–$50/yard. The equivalent in bags costs $135–$215/yard. Bags are only practical for very small areas or when delivery is not possible.

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