Cubic Yard Calculator – Calculate Volume in Cubic Yards
The cubic yard calculator helps you quickly determine how many cubic yards of material—such as concrete, mulch, gravel, or topsoil—you need for any construction or landscaping project. Simply enter the length, width, and depth of your area and the calculator does the rest. Accurate volume estimates save you money by preventing under-ordering or costly over-purchasing.
Enter the length of the area in feet.
Enter the width of the area in feet.
Enter the depth or thickness in inches.
If you have multiple identical areas, enter the count here.
Add extra material to account for waste or spillage. 10% is common.
Your results will appear here
How to Use This Calculator
1. Enter the length of your project area in feet. 2. Enter the width of the area in feet. 3. Enter the depth or thickness of the material in inches (e.g., 4 inches for a concrete slab). 4. If you have multiple identical areas, enter the number of areas in the 'Number of Areas' field. 5. Adjust the waste/overage factor slider—10% is a standard recommendation for most projects. 6. Review your results, including cubic yards needed, cubic yards with waste, cubic feet, cubic meters, and equivalent bag counts.
How to Calculate Cubic Yards
A cubic yard is a unit of volume equal to a cube that is one yard (3 feet) on each side. It is the standard unit used in the construction and landscaping industries for ordering materials like concrete, gravel, mulch, and topsoil.
The Formula
The calculation involves three steps:
- Step 1 – Convert depth to feet: Depth (inches) ÷ 12 = Depth (feet)
- Step 2 – Calculate cubic feet: Length (ft) × Width (ft) × Depth (ft) = Cubic Feet
- Step 3 – Convert to cubic yards: Cubic Feet ÷ 27 = Cubic Yards
Since there are 3 feet in a yard, there are 3 × 3 × 3 = 27 cubic feet in one cubic yard.
Adding a Waste Factor
It is standard practice to order 10–15% more material than your calculated volume to account for spillage, uneven ground, compaction, and measurement imprecision. For critical pours like concrete, some contractors recommend up to 15–20% overage.
Common Material Reference
- Concrete slab: Typical depth is 4 inches for walkways, 6 inches for driveways.
- Mulch: 2–3 inch depth is standard for garden beds.
- Topsoil/fill dirt: 6–12 inches for lawn establishment.
- Gravel/base: 4–6 inches for driveways and paths.
Cubic Yards to Bags Conversion
If you are using pre-mixed concrete bags instead of ordering bulk concrete, this calculator shows you the equivalent number of 60 lb and 80 lb bags. One cubic yard of concrete requires approximately 45 bags of 60 lb mix or 34 bags of 80 lb mix.