Convert square feet to cubic yards for concrete, gravel, and landscaping. Free volume calculator with cost estimation, waste factor, and currency support.
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Faiq Ur Rahman is a web designer, digital product developer, and Founder of Techraxy, a growing platform of online calculators and utility tools. He specializes in building structured, user-friendly tools focused on finance, health, conversions, productivity, and everyday problem-solving. He is passionate about developing practical digital solutions that make complex tasks simpler for users worldwide.
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When you’re ordering concrete for a patio, gravel for a driveway, or soil for a garden bed, suppliers quote prices in cubic yards but your measurements are likely in square feet with a depth in inches. Converting between these units is essential for accurate material ordering and cost estimation. This square feet to cubic yards calculator bridges that gap, helping you determine exactly how much material you need based on the area and depth of your project.
Contractors, landscapers, DIY homeowners, and construction professionals all face this conversion challenge regularly. The calculator accepts area in multiple units square feet, square yards, square meters, square inches, square centimeters, and square millimeters and depth in feet, inches, yards, meters, centimeters, or millimeters. It then provides volume in cubic yards, cubic feet, and cubic meters with cost estimates based on your price per cubic yard.
Techraxy built this square feet to cubic yards calculator to simplify material estimation for construction and landscaping projects. Everything runs locally in your browser, so your project data stays private while you plan your next build.
Enter the area of your project space in your preferred unit — square feet, square yards, square meters, square inches, square centimeters, or square millimeters.
Input the depth or thickness of the material layer in your chosen unit , feet, inches, yards, meters, centimeters, or millimeters.
Set the number of identical areas you’re calculating (for multiple sections).
Enter the price per cubic yard and select your currency from the dropdown menu.
Adjust the waste factor percentage to account for compaction, spillage, and over-excavation.
Review the summary tab for total volume and estimated cost, or switch to the detailed breakdown tab for a complete itemized view.
Converting square feet to cubic yards requires multiplying area by depth and then dividing by 27, since one cubic yard equals 27 cubic feet.
Volume (Cubic Yards) = (Area in Square Feet × Depth in Feet) / 27
This formula works because volume equals area times depth. All units convert to feet before calculation to maintain consistency.
The calculator handles these area units:
Square feet (ft²) — standard imperial
Square yards (yd²) — 1 yd² = 9 ft²
Square meters (m²) — 1 m² = 10.7639 ft²
Square inches (in²) — 1 in² = 1/144 ft²
Square centimeters (cm²) — 1 cm² = 0.00107639 ft²
Square millimeters (mm²) — 1 mm² = 0.0000107639 ft²
Depth units convert to feet using standard length conversions:
1 foot = 1 foot
1 inch = 1/12 foot
1 yard = 3 feet
1 meter = 3.28084 feet
1 centimeter = 0.0328084 feet
1 millimeter = 0.00328084 feet
With Quantity: Total Volume = Volume per Area × Number of Areas
With Waste Factor: Volume with Waste = Total Volume × (1 + Waste Percentage / 100)
Cost Calculation: Estimated Cost = Total Volume × Price per Cubic Yard
A homeowner is pouring a concrete patio measuring 200 square feet with a planned depth of 4 inches. Concrete costs $120 per cubic yard, and the homeowner wants to include a 10% waste factor.
Step 1: Convert depth to feet — 4 inches ÷ 12 = 0.3333 feet.
Step 2: Calculate cubic feet — 200 sq ft × 0.3333 ft = 66.67 cubic feet.
Step 3: Convert to cubic yards — 66.67 ÷ 27 = 2.469 cubic yards.
Step 4: Apply the waste factor — 2.469 × 1.10 = 2.716 cubic yards.
Step 5: Calculate cost — 2.469 × $120 = $296.28 total, or $325.92 with waste included.
The homeowner needs about 2.5 cubic yards of concrete for the patio, or 2.72 cubic yards when ordering with waste factor. This estimate helps with ordering the right amount of concrete for the pour.
The formula is (Area in square feet × Depth in feet) / 27 = Cubic yards. All dimensions must be in feet before calculation. The calculator handles all unit conversions automatically.
A cubic yard covers different areas depending on depth. At 1 inch deep, 1 cubic yard covers 324 square feet. At 3 inches deep, it covers 108 square feet. At 6 inches deep, it covers 54 square feet. The formula is Area = 324 / Depth in inches.
Convert inches to feet by dividing by 12, multiply by the area in square feet, then divide by 27. For example: 100 sq ft at 6 inches = 100 × (6/12) = 50 cubic feet, divided by 27 = 1.85 cubic yards.
One cubic yard equals 27 cubic feet. Cubic yards are the standard unit for ordering bulk materials, while cubic feet are more commonly used for smaller volumes or when first calculating volume.
Waste factor accounts for material lost to compaction (especially for gravel and soil), spillage during delivery and placement, over-excavation, and measurement errors. Construction projects typically use 5% to 15% waste factors depending on the material and job.
Yes, the calculator accepts area in square meters, square centimeters, square millimeters, and other units. Depth accepts meters, centimeters, and millimeters. All units convert to feet automatically before calculation.
The calculator supports USD, EUR, GBP, CAD, AUD, JPY, INR, PKR, AED, SAR, SGD, MYR, PHP, KRW, CHF, and NZD. The currency symbol updates automatically when you select a different currency.
The calculator uses the standard conversion formula with precise unit conversions. Results are accurate to four decimal places, providing sufficient precision for ordering materials.
For concrete, 10% to 15% waste accounts for spillage and formwork. For gravel, 10% to 15% accounts for compaction. For soil and fill, 15% to 20% allows for settlement and over-excavation. For mulch and landscaping materials, 5% to 10% is usually sufficient.
Calculate the volume for one area, then multiply by the number of areas. The calculator includes a quantity field for this purpose.
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