Foot Home / Square Feet to Cubic Feet
MEASURE WITH CONFIDENCE
Square Feet to Cubic Feet
Multiply area by depth to calculate cubic feet and cubic yards. Enter depth in inches or feet.
01 / YOUR MEASUREMENTS
Plan your space
Your measurements stay in this browser and the share link. No sign-up needed.
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.