Concrete & Landscaping
Cubic Yard Calculator
Convert length, width and depth into cubic yards for concrete, soil, mulch or gravel.
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Concrete & Landscaping
Square Feet to Cubic Yards
Already know the square footage? Enter the area and the depth you want to fill to convert it straight to cubic yards.
What does this tool do?
Landscape and aggregate suppliers quote by the cubic yard, but most people know their area in square feet. This converter bridges the two with the one extra number you need: depth.
How does it work?
Area × depth in feet gives cubic feet; dividing by 27 gives cubic yards. If you need to measure the area first, the Cubic Yard Calculator takes length and width directly, and Calculate Cubic Yards handles circles and triangles.
What information is needed?
- Area in square feet
- Depth in inches
How to use the Square Feet to Cubic Yards
- Enter the area.
- Enter the depth.
- Select Calculate and add 5–10% for settling.
The formula
In plain terms, here is the calculation the tool runs:
Cubic yards = Area × (Depth ÷ 12) ÷ 27
Shortcut: Area × Depth ÷ 324
- 324
- 12 × 27 — combines both conversions
Worked example
Example
Mulching 500 sq ft of beds 3" deep.
- 500 × 3 ÷ 12 = 125 cu ft
- 125 ÷ 27 = 4.63 cu yd
Order 5 cubic yards of mulch.
Frequently asked questions
How many square feet does a cubic yard cover?
Divide 324 by the depth in inches: 162 sq ft at 2″, 108 at 3″, 81 at 4″.
How many bags equal a yard?
About 13.5 bags of 2 cu ft, or 9 bags of 3 cu ft.
Does this work for concrete?
Yes. Use slab thickness as the depth and add 5–10% waste.
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