Soil, mulch and gravel calculator
Work out how much soil, mulch or gravel you need for a garden bed or area, in cubic feet, cubic yards, cubic meters, liters and bags.
Fix the highlighted fields to see your result.
Volume needed—
- Cubic meters
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- Liters
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- Cubic feet
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- Cubic yards
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- 2 cu ft bags
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- 40 L bags
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How it is calculated
Volume = Length × Width × Depth
1 m³ = 1,000 L = 35.31 cu ft · 1 cu yd = 27 cu ft.
Assumptions and limitations
- Soil settles: many gardeners buy a little extra.
- Bag counts are rounded up.
This tool is educational and provides estimates. It is not a credit offer or financial advice. Actual terms are set by each institution.
Frequently asked questions
How much mulch do I need?
Multiply length × width × depth. A 10 × 3 ft bed with 3 inches of mulch needs 7.5 cubic feet, about four 2-cubic-foot bags.
How many cubic feet are in a cubic yard?
27 cubic feet. Bulk soil and mulch are usually sold by the cubic yard.
How deep should mulch or soil be?
It depends on the plants and the product. Follow the guidance on the bag or from your local extension service or nursery.