How Much Topsoil for 50 Square Feet?
For 50 square feet at 6 inches deep — standard for a new lawn or garden bed — you need 1.02 cubic yards of topsoil. That's 37 bags (40 lb) or 28 bags (1 cu ft), with 10% waste included.
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Our editorial team researches and fact-checks material calculations with input from licensed contractors, landscape designers, and certified tradespeople across the US.
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Answer at a glance — 50 sq ft
| Depth | Cu yards | 40 lb bags | 1 cu ft bags | Tons |
|---|---|---|---|---|
| 2" | 0.34 cu yd | 13 | 10 | 0.4 |
| 4" | 0.68 cu yd | 25 | 19 | 0.7 |
| 6" | 1.02 cu yd | 37 | 28 | 1.1 |
| 8" | 1.36 cu yd | 49 | 37 | 1.5 |
| 12" | 2.04 cu yd | 74 | 56 | 2.2 |
All counts include 10% waste, rounded up.
How we calculated it
- Volume = 50 × 6 ÷ 12 = 25 cu ft
- Cubic yards = 25 ÷ 27 = 0.93 cu yd
- With 10% waste = 1.02 cu yd
- 40 lb bags (approx. 0.75 cu ft each) = 37 bags
Compare nearby areas
| Area | At 4" (top-dress) | At 6" (new lawn) | At 8" (garden) |
|---|---|---|---|
| 25 sq ft | 0.34 cu yd / 13 bags | 0.51 cu yd / 19 bags | 0.68 cu yd / 25 bags |
| 50 sq ft | 0.68 cu yd / 25 bags | 1.02 cu yd / 37 bags | 1.36 cu yd / 49 bags |
| 100 sq ft | 1.36 cu yd / 49 bags | 2.04 cu yd / 74 bags | 2.72 cu yd / 98 bags |
| 200 sq ft | 2.72 cu yd / 98 bags | 4.07 cu yd / 147 bags | 5.43 cu yd / 196 bags |
Depth guide by use
| Application | Recommended depth |
|---|---|
| Overseeding / top-dressing | 2 inches |
| Patching bare lawn spots | 2–4 inches |
| New lawn from seed | 4–6 inches |
| New lawn from sod | 4–6 inches |
| Vegetable garden | 8–12 inches |
| Raised bed (fill) | 12–18 inches |
Bags vs. bulk topsoil
For 50 sq ft you need 1.02 cubic yards — buying 37 bags is the easy choice. Most suppliers require a 2-yard minimum for bulk delivery.
Use the Topsoil Calculator to enter your exact dimensions and get an instant bag count or cubic yard total.
Frequently Asked Questions
How much topsoil do I need for 50 square feet?
For 50 sq ft at 6 inches deep (standard for new lawn or garden beds), you need 1.02 cubic yards or 37 bags of 40 lb topsoil, with 10% waste included.
How many cubic yards of topsoil for 50 square feet?
At 4 inches: 0.68 cu yd. At 6 inches: 1.02 cu yd. At 8 inches: 1.36 cu yd. All include 10% waste.
How many bags of topsoil for 50 square feet?
At 6 inches: 37 bags of 40 lb topsoil (approx. 0.75 cu ft each) or 28 bags of 1 cu ft topsoil. For areas over 2 cubic yards, bulk delivery is usually cheaper.
How deep should I add topsoil for grass or a garden?
For overseeding an existing lawn: 2 inches. For a new lawn: 4–6 inches. For vegetable gardens: 8–12 inches. For raised beds, fill the full depth with a topsoil/compost mix.
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