Enter an area in square feet and a depth in inches to calculate volume in cubic feet.
How to Use the Square Feet to Cubic Feet Calculator
Area goes in square feet, depth goes in inches — that split matters, since a slab or bed's footprint and its thickness are almost always quoted in different units.
cubic feet = area (ft²) × (depth (in) ÷ 12)This is the same math the Concrete, Gravel, and Mulch calculators run internally, just exposed directly for anyone who already has a total square footage figure rather than separate length and width numbers — a floor plan from an architect, say, or a footprint already summed from irregular sections. The cubic yards conversion sits alongside it since that's the unit most bulk suppliers actually sell by.