Cubic Yard Calculator
Estimate the cubic yards of material needed for your landscaping, construction, or gardening project. Calculate volume for rectangular areas, circular footings, or multiple sections with mixed dimension units (feet, inches, meters), waste allowances, and material cost estimates.
Direct Formula: How to Calculate Cubic Yards
For a rectangular area: Volume (yd³) = Length (ft) × Width (ft) × Depth (ft) ÷ 27. When depth is measured in inches, divide inches by 12 first to convert to feet.
2.47 yd³
🔄 Secondary Quick Utility: Cubic Feet ↔ Cubic Yards Converter
Need a quick standalone volume unit conversion? 1 cubic yard equals exactly 27 cubic feet.
How to Use the Cubic Yard Calculator
- Select your project shape: Choose "Rectangle" for standard slabs and beds, "Circle" for round footings and holes, or "Multiple Sections" to combine complex areas.
- Select your material type (Concrete, Gravel, Mulch, Topsoil, Fill Dirt, Sand, Asphalt) to customize labels and view contextual recommendations.
- Enter project dimensions: Enter Length, Width, and Depth/Thickness. Each dimension supports independent units (e.g. feet for length/width and inches for depth).
- Choose a waste & overage allowance (0%, 5%, 10%, 15%, or Custom) to account for uneven ground, compaction, and edge loss.
- Optionally check "Estimate Material Cost" to enter your material price per cubic yard, cubic foot, or cubic meter.
- View instant results showing your Recommended Order Volume in cubic yards (yd³), cubic feet (ft³), cubic meters (m³), and suggested rounded planning quantities.
- Use the secondary Quick Converter below to instantly convert standalone cubic feet to cubic yards.
How to Calculate Cubic Yards (Formulas)
Understanding Cubic Yardage, Mixed Units & Material Waste
A cubic yard (yd³) is a standard metric of volume in North American construction and landscaping, equal to a cube measuring 3 feet long by 3 feet wide by 3 feet deep (27 cubic feet). In real-world projects, measurements are frequently mixed: length and width are measured in feet, whereas depth or slab thickness is measured in inches. Converting depth to feet (inches ÷ 12) before multiplying is essential for accurate volume calculations. Additionally, adding a 5% to 15% waste allowance is standard practice in masonry, concrete pouring, and landscaping to prevent material shortages caused by uneven subgrades, compaction, spillage, and irregular borders.
Published Clinical & Scientific References
- American Concrete Institute (ACI 301) — Specifications for Structural Concrete (Volume & Placement).
- National Concrete Masonry Association (NCMA) — Material Volume & Estimating Standards.
- USDA Forest Service — Landscape Mulch & Soil Coverage Guidelines.
Frequently Asked Questions
What is a cubic yard?
A cubic yard (yd³) is a unit of volume equal to a cube that is 3 feet long, 3 feet wide, and 3 feet deep. One cubic yard contains exactly 27 cubic feet (or 46,656 cubic inches).
How many cubic feet are in one cubic yard?
There are exactly 27 cubic feet in 1 cubic yard (3 ft × 3 ft × 3 ft = 27 ft³). To convert cubic feet to cubic yards, divide by 27.
How do you calculate cubic yards for a rectangle?
Multiply Length (ft) × Width (ft) × Depth (ft), then divide the total cubic feet by 27. If depth is in inches, divide by 12 first (e.g. 4 inches = 0.333 ft).
How do I calculate cubic yards when depth is in inches?
Convert depth from inches to feet by dividing by 12. For example, for a 20 ft by 10 ft patio poured 4 inches deep: 20 × 10 × (4 ÷ 12) = 66.67 ft³. Dividing 66.67 by 27 gives 2.47 cubic yards.
How much extra material (waste allowance) should I order?
Contractors typically add 5% to 10% extra material for standard concrete slabs and gravel driveways, and up to 15% for irregular landscape beds or uneven excavations to prevent running short.
Can I use this calculator for concrete?
Yes. The calculator computes exact concrete volume in cubic yards and cubic feet. For ready-mix concrete orders, suppliers typically round up to the nearest quarter-yard (0.25 yd³).
Can I use this calculator for mulch, topsoil, or gravel?
Yes. It works for all bulk landscaping materials including mulch, topsoil, fill dirt, sand, and gravel.
Does this calculator estimate weight (tons)?
This calculator measures geometric volume (cubic yards). Material weight varies significantly by moisture and density (e.g. 1 yd³ of gravel weighs ~2,700 lbs, whereas 1 yd³ of mulch weighs ~800 lbs). For asphalt tonnage specifically, use our Asphalt Calculator.
Can I calculate multiple sections at once?
Yes. Select "Multiple Sections" to combine up to 10 separate rectangular or circular project areas into one total cubic yard estimate.
How many 2-cubic-foot bags equal 1 cubic yard?
Since 1 cubic yard equals 27 cubic feet, it takes 13.5 bags of 2-cubic-foot mulch or soil to equal 1 cubic yard.
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