Home / Square Feet to Cubic Feet & Cubic Yards Calculator
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Square Feet to Cubic Feet & Cubic Yards Calculator
Multiply area by depth to calculate cubic feet and cubic yards. Enter depth in inches or feet.
01 / YOUR MEASUREMENTS
Plan your space
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02 / YOUR ESTIMATE
At a glance
Enter your measurements, then calculate.
Keep full precision while calculating. Round only when planning or ordering.
See formulas & sources ↗Area needs a depth to become volume
Square feet measure a surface. Cubic feet measure the space extending above or below it. Convert an inch depth to feet by dividing by 12, then multiply by the area.
For 100 sq ft at 4 inches deep: 100 × (4 ÷ 12) = 33.33 cubic feet. Divide by 27 for 1.23 cubic yards. Use an average depth only when it reasonably represents the whole area.
Formulas and exact conversion constants: methodology and sources.