Square Feet to Cubic Yards Converter
Convert area to volume for concrete, gravel, mulch, soil, and more
🔄 Conversion Direction
length × width
🧱 Material Type (optional)
📊 Conversion Result
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⚠️ Disclaimer: Always consult a structural engineer for load-bearing elements. This tool provides estimates only. Material densities vary — consult your supplier for exact requirements.
📖 How to Use This Square Feet to Cubic Yards Converter
Follow these steps to convert between area and volume for construction materials:
- Select conversion direction — Square Feet → Cubic Yards OR Cubic Yards → Square Feet.
- Enter area or volume — For area: length × width of your project area. For volume: cubic yards of material.
- Enter depth/thickness — How deep the material will be spread (e.g., 4 inches for concrete slab, 3 inches for gravel).
- Select material type (optional) — Helps with typical depth recommendations.
- Click convert — Get instant results in cubic yards or square feet, plus material recommendations.
Formula: Cubic Yards = (Square Feet × Depth in Feet) ÷ 27
Or: Square Feet = (Cubic Yards × 27) ÷ Depth in Feet
Or: Square Feet = (Cubic Yards × 27) ÷ Depth in Feet
Pro tip: Always add 5-10% extra for waste, compaction, and uneven surfaces. Gravel and soil compact — order extra!
🏗️ Real-World Conversion Examples
Example 1: Concrete Driveway (500 sq ft, 4 inches thick)
Calculation: 500 × (4 ÷ 12) = 166.67 cu ft ÷ 27 = 6.17 cubic yards
With 10% waste: 6.8 cubic yards to order
Calculation: 500 × (4 ÷ 12) = 166.67 cu ft ÷ 27 = 6.17 cubic yards
With 10% waste: 6.8 cubic yards to order
Example 2: Gravel for Pathway (200 sq ft, 3 inches deep)
Calculation: 200 × (3 ÷ 12) = 50 cu ft ÷ 27 = 1.85 cubic yards
With 10% compaction factor: 2.0 cubic yards
Calculation: 200 × (3 ÷ 12) = 50 cu ft ÷ 27 = 1.85 cubic yards
With 10% compaction factor: 2.0 cubic yards
Example 3: Mulch for Garden (300 sq ft, 2 inches deep)
Calculation: 300 × (2 ÷ 12) = 50 cu ft ÷ 27 = 1.85 cubic yards
Bags needed (2 cu ft each): 25 bags
Calculation: 300 × (2 ÷ 12) = 50 cu ft ÷ 27 = 1.85 cubic yards
Bags needed (2 cu ft each): 25 bags
Example 4: Reverse — 10 cubic yards of soil, 6 inches deep
Calculation: (10 × 27) ÷ (6 ÷ 12) = 270 ÷ 0.5 = 540 square feet coverage
Calculation: (10 × 27) ÷ (6 ÷ 12) = 270 ÷ 0.5 = 540 square feet coverage
📊 Quick Reference: Depth to Cubic Yards
For 1,000 square feet, here’s how many cubic yards you need at various depths:
1 inch
3.09 cu yd
3.09 cu yd
2 inches
6.17 cu yd
6.17 cu yd
3 inches
9.26 cu yd
9.26 cu yd
4 inches
12.35 cu yd
12.35 cu yd
5 inches
15.43 cu yd
15.43 cu yd
6 inches
18.52 cu yd
18.52 cu yd
Formula: (1,000 sq ft × depth in inches ÷ 12) ÷ 27 = cubic yards
❓ Frequently Asked Questions
How do I convert square feet to cubic yards?
Multiply square feet by the depth in feet, then divide by 27. Example: 500 sq ft × (4 inches ÷ 12) = 166.67 cu ft ÷ 27 = 6.17 cubic yards.
How many square feet does one cubic yard cover?
One cubic yard covers approximately 81 sq ft at 4 inches deep, 108 sq ft at 3 inches deep, or 162 sq ft at 2 inches deep.
What’s the difference between a cubic yard and a square yard?
A square yard measures area (3 ft × 3 ft = 9 sq ft). A cubic yard measures volume (3 ft × 3 ft × 3 ft = 27 cu ft) — it includes depth.
How much concrete do I need for a 10×10 slab?
10′ × 10′ = 100 sq ft. At 4 inches thick: 100 × 0.333 = 33.3 cu ft ÷ 27 = 1.23 cubic yards. Order 1.3-1.4 yards with waste.
How much gravel do I need for a driveway?
For a 20′ × 40′ driveway (800 sq ft) at 4 inches deep: 800 × 0.333 = 266 cu ft ÷ 27 = 9.9 cubic yards. Add 10-15% for compaction.
Do I need to account for compaction?
Yes! Gravel, soil, and mulch compact 10-25% when compressed. Order 15-25% extra for gravel driveways and fill dirt. Concrete and asphalt don’t compact significantly.
