Cubic Yard Calculator
Calculate volume in cubic yards, cubic feet, and cubic meters for rectangular, circular, or triangular areas. Add multiple areas and get tons based on material density.
What is a Cubic Yard Calculator?
A cubic yard calculator converts the dimensions of a space or volume of material into cubic yards — the standard unit used for ordering concrete, gravel, sand, topsoil, and mulch in the United States. One cubic yard equals 27 cubic feet (a 3×3×3 ft cube), and knowing the exact volume needed lets you order the right quantity of material, avoiding costly over-ordering or shortage delays on construction and landscaping projects.
This calculator handles three common shape types: rectangular areas (length × width × depth), circular areas (π × radius² × depth), and triangular areas (½ × base × height × depth). For larger projects involving multiple distinct areas — such as a driveway with separate rectangular and curved sections — the batch addition feature accumulates volumes across all areas before generating a single total order quantity, preventing the rounding errors that arise from ordering each section separately.
Material weight estimates are critical for delivery planning. Different materials have vastly different densities: mulch weighs only ~400 lbs per cubic yard, while concrete weighs over 4,000 lbs per cubic yard. Knowing the total weight before ordering ensures you arrange appropriately-rated delivery vehicles and confirms whether your structure or site access can bear the load. This calculator provides weight estimates for the five most common landscaping and construction materials.
How the Cubic Yard Calculator Works
Formula, assumptions, and calculation steps for this construction tool.
Formula Used
1 cubic yard = 27 cubic feet; Cubic Yards = (Length x Width x Height in feet) / 27
Methodology
Multiplies the three dimensions in feet and divides by 27 to convert cubic feet into cubic yards.
Calculation Steps
- Enter project dimensions and material specifications.
- Convert measurements to a consistent unit system.
- Calculate area, volume, count, or weight.
- Apply waste factor or price where requested.
Assumptions and Limits
- Site conditions, cuts, laps, and installation patterns affect real material needs.
- Waste factors should be adjusted for project complexity.
- Verify estimates with drawings and contractor guidance.
Frequently Asked Questions
A cubic yard is a 3×3×3 foot cube — 27 cubic feet of space. Visually, it's roughly the size of a washing machine. A standard pickup truck bed holds about 1 cubic yard of material.
Divide cubic feet by 27. For example, 54 cubic feet ÷ 27 = 2 cubic yards. To convert cubic meters to cubic yards, multiply by 1.308.
Normal-weight concrete weighs approximately 3,600–4,050 lbs per cubic yard (2,200–2,400 kg/m³). This calculator uses 4,050 lbs (2,400 kg/m³) as a standard.
Yes — use the + Add Area button to save the current calculation and add it to a running total. Each saved area appears as a line item, and the results show the combined cubic yards for all areas.
Real-World Applications
Common Mistakes
Material Volume-to-Weight Reference
| Material | lb / cu yd | kg / cu yd | Notes |
|---|---|---|---|
| Topsoil | 2,000 | 907 | Varies with moisture |
| Mulch (wood chip) | 400 | 181 | Very lightweight |
| Gravel (crushed) | 2,800 | 1,270 | Varies by stone size |
| Dry sand | 2,700 | 1,225 | Dry compacted |
| Ready-mix concrete | 4,050 | 1,837 | Standard mix |
| Crushed stone (3/4") | 2,500 | 1,134 | Road base grade |
References
- American Concrete Institute. ACI 318-19: Building Code Requirements for Structural Concrete. ACI, 2019.
- Portland Cement Association. Concrete Slab Thickness Design Guide. PCA, 2020.
- National Ready Mixed Concrete Association. Concrete Basics. NRMCA, 2022.
- Kosmatka, S.H. et al. Design and Control of Concrete Mixtures. Portland Cement Association, 2011.
- USDA Natural Resources Conservation Service. Landscape Architecture Technical Note. USDA, 2021.
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