Square Feet and Cubic Feet
Type values — results update instantly (no buttons).
Decimals:
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÷ / × height
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÷ / × height
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Cubic ft → Square ft
ft² = ft³ ÷ height(ft)
Square ft → Cubic ft
ft³ = ft² × height(ft)
How the Cubic Feet to Square Feet Works
Area (square feet) relates to volume (cubic feet) through a chosen third dimension (height/depth). If you know any two of (area, height, volume), the third is determined:
- Square feet = Cubic feet ÷ Height (in feet).
- Cubic feet = Square feet × Height (in feet).
- Height (ft) = Cubic feet ÷ Square feet.
The calculator converts inches to feet automatically and rounds only for display (you control decimals above).
Square feet to cubic feet formula
ft³ = ft² × height(ft) . Example: 250 ft² at 8 ft high → 250 × 8 = 2000 ft³.
How to convert square feet to cubic feet
- Enter the floor/wall area in ft².
- Enter the layer thickness or height (choose ft or in).
- The tool outputs volume in ft³ in real time.
Cubic feet to square feet formula
ft² = ft³ ÷ height(ft) . Example: 120 ft³ spread 6 in (0.5 ft) thick covers 120 ÷ 0.5 = 240 ft².
How to convert cubic feet to square feet
- Enter the volume in ft³.
- Enter the height/depth (ft or in).
- The tool outputs area in ft² instantly.
Quick answers
- How many sq ft are in 1 cubic ft? It depends on height. With 1 ft height → 1 ft²; with 6 in (0.5 ft) → 2 ft²; with 3 in (0.25 ft) → 4 ft².
- Is a cubic foot 12×12×12? Yes: 12 in × 12 in × 12 in = 1728 in³ = 1 ft³.
- What is 2000 cubic feet in square feet? Depends on height. For 8 ft → 2000 ÷ 8 = 250 ft²; for 10 ft → 200 ft².
- How much sq ft does 1 cu ft cover?
coverage(ft²) = 1 ÷ height(ft). Example: 2 in (0.1667 ft) layer → ≈ 6 ft².
Common Square Feet, Height & Cubic Feet Table
| Square feet (ft²) | Height / depth | Cubic feet (ft³) |
|---|---|---|
| 100 ft² | 8 ft | 800 ft³ |
| 100 ft² | 9 ft | 900 ft³ |
| 100 ft² | 10 ft | 1000 ft³ |
| 100 ft² | 12 ft | 1200 ft³ |
| 150 ft² | 8 ft | 1200 ft³ |
| 150 ft² | 9 ft | 1350 ft³ |
| 150 ft² | 10 ft | 1500 ft³ |
| 150 ft² | 12 ft | 1800 ft³ |
| 250 ft² | 8 ft | 2000 ft³ |
| 250 ft² | 9 ft | 2250 ft³ |
| 250 ft² | 10 ft | 2500 ft³ |
| 250 ft² | 12 ft | 3000 ft³ |
| 300 ft² | 8 ft | 2400 ft³ |
| 300 ft² | 9 ft | 2700 ft³ |
| 300 ft² | 10 ft | 3000 ft³ |
| 300 ft² | 12 ft | 3600 ft³ |
Frequently Asked Questions
Can you convert cubic feet to square feet?
Yes, but you must know the height/depth. Formula: square feet = cubic feet ÷ height (in feet). Without a height/depth, a direct conversion isn’t possible.
How do I convert square feet back to cubic feet?
Multiply by the height/depth in feet. Formula: cubic feet = square feet × height (in feet).
What if my height is in inches or centimeters?
Convert height to feet first: inches ÷ 12 = feet; centimeters ÷ 30.48 = feet; meters × 3.28084 = feet. Then use the formulas.
Example: 120 ft³ at 8 ft height—how many ft² is that?
Square feet = 120 ÷ 8 = 15 ft².
Is square feet area and cubic feet volume?
Correct. Square feet (ft²) measures area; cubic feet (ft³) measures volume. You need a third dimension (height/depth) to move between them.
What height/depth should I use?
Use the actual thickness or height of the space/material. For floors or slabs, use thickness (e.g., 4 in = 0.333 ft). For rooms, use ceiling height (e.g., 8 ft).
Can I enter mixed units like inches for height and feet for area?
Yes—just convert the height to feet first. For example, 6 inches = 0.5 ft. Then apply the ft³ to ft² formulas.