Enter Project Details
Formula Used
Convert depth into feet before finding project volume. Multiply square feet by that converted depth. Divide cubic feet by twenty-seven for cubic yards.
For inches, divide square feet times depth by 324. Add waste before applying the compaction allowance. Round purchasing quantities upward to prevent material shortages.
How to Use This Calculator
Select the mode matching your available measurements. Enter positive dimensions and choose matching measurement units. Then add material, waste, pricing, and delivery details.
Use multiple sections for irregular projects with separate dimensions. Review raw volume before accepting the adjusted order quantity. Export results when sharing estimates with suppliers or clients.
Example Data
| Project | Area | Depth | Approximate raw yards |
|---|---|---|---|
| Mulch bed | 500 ft² | 3 inches | 4.63 yd³ |
| Gravel driveway | 1,200 ft² | 4 inches | 14.81 yd³ |
| Concrete slab | 800 ft² | 6 inches | 14.81 yd³ |
| Topsoil lawn | 2,000 ft² | 2 inches | 12.35 yd³ |
Area and Volume Explained
Square feet describes surface area, not three-dimensional volume. A depth measurement creates the missing third dimension. Therefore, direct conversion without depth remains mathematically impossible.
Greater depth increases material volume in direct proportion. Doubling depth doubles the required cubic yard quantity. Accurate field measurements reduce waste and ordering mistakes.
Calculation History
Frequently Asked Questions
Can square feet convert directly into cubic yards?
No, because square feet measures only surface area. You must also know the material depth. Depth converts a flat area into three-dimensional volume.
How many cubic feet are in one cubic yard?
One cubic yard contains exactly twenty-seven cubic feet. It measures three feet along every side. Use this relationship after calculating total cubic feet.
Why does the calculator include waste?
Waste covers spills, uneven grading, and measurement uncertainty. Different materials need different practical allowance percentages. Many projects use five to ten percent.
What does compaction allowance mean?
Loose material often settles after spreading and mechanical compaction. Compaction allowance adds material for that expected volume loss. Soil and aggregate commonly need larger allowances.
Should concrete use a compaction allowance?
Concrete usually needs waste rather than soil-style compaction allowance. Ordering practices depend on placement conditions and supplier rules. Confirm requirements with your concrete provider before ordering.
How accurate are material density estimates?
Density changes with moisture, grading, and material composition. Presets provide planning estimates instead of certified weights. Supplier data gives the most reliable hauling estimate.
How does order rounding work?
Ordering rounds volume upward to your chosen increment. This matches common supplier billing and loading practices. Upward rounding also reduces shortage risks during installation.
Can this calculator handle irregular projects?
Yes, divide the project into simpler rectangular sections. Enter every section with its own measurements. The calculator combines all valid section volumes automatically.
How do I calculate coverage from cubic yards?
Select the Find Coverage mode before calculating. Enter available cubic yards and the planned depth. The result shows the supported square footage.
Can I estimate the required depth?
Select Find Depth and enter area plus volume. The calculator determines depth from those supplied measurements. Results include both feet and converted inches.
Are exported estimates final supplier quotes?
No, exports summarize values entered into this calculator. Actual prices and delivery terms can differ. Confirm final quantities and costs before purchasing materials.