Convert a square-foot area to cubic feet by adding depth or height, with results in cubic yards, cubic metres, and litres.
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Area to Volume Conversion
A square feet to cubic feet calculator converts a flat area measurement into a volume by adding a depth or height dimension. It is used for estimating fill material, concrete volume, mulch depth, and any project where you know the area and need to figure out how much material to order by volume.
Square feet measure area only. To get volume, you need a third dimension. Multiply the square footage by the depth in feet to get cubic feet. If the depth is in inches, divide by 12 first.
The result can then be converted to cubic yards (divide by 27), cubic metres, or litres for comparison with material packaging and delivery units.
Cubic feet = Square feet x Depth (ft)
Multiply the area in square feet by the depth in feet to get the volume in cubic feet.
Use this conversion whenever you have measured a flat area and need to order a volume-based material. Common examples include filling a raised bed with soil, pouring a concrete slab, spreading gravel on a driveway, or covering a garden bed with mulch to a specified depth.
Frequently asked questions
Divide the depth in inches by 12 to convert it to feet, then multiply by the square footage.
There are 27 cubic feet in one cubic yard.
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