Cubic Yard Calculator
Measure length and width, then enter the installed depth. Each area is converted to a common cubic unit before the volumes are added.
How to use this calculator
Enter length and width for the area.
Enter depth with its actual unit, such as inches or centimeters.
Add other areas and read the combined volume.
Formula
Volume = length × width × depth. Cubic yards = cubic feet ÷ 27. Total volume is the sum of all areas.
Worked example
A 12 ft × 9 ft area at 4 in deep is 36 ft³, or 36 ÷ 27 = 1.333 yd³ before any allowance.
Assumptions and limits
- Each entry is a rectangular prism.
- Depth is the compacted or installed depth entered by the user.
- No material density or waste is applied.
Sources
- National Institute of Standards and Technology: Circumference, Area and VolumeArea and volume formulas for common geometric shapes. Reviewed 2026-08-14.
- National Institute of Standards and Technology: Unit ConversionExact unit conversion and final-result rounding guidance. Reviewed 2026-08-14.
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Verification
How this calculator is checked
Trust comes from reproducible evidence, not model confidence. You can inspect the formula, assumptions, worked example, and cited sources on this page.
- Versioned calculationFormula logic is kept separate from the interface and covered by automated registry and behavior checks.
- Cited evidenceSources linked for independent checking: 2.
- Transparent AI useAI may assist drafting or adversarial review. Agreement between models is not proof, and no human expert review is claimed unless a named reviewer is shown.
Frequently asked questions
Why are there 27 cubic feet in a cubic yard?
One yard equals 3 feet, so a cubic yard is 3 × 3 × 3 = 27 cubic feet.
Can I use metric and US customary units in the Cubic Yard Calculator?
Yes. Unit changes convert the same canonical measurement; they do not reinterpret or round your original value.
When does the calculator round?
The calculation keeps full precision internally and rounds only the displayed result. Whole packages are rounded up at the final step.
Last updated 2026-08-25 · 1.0.0 · 1.0.0 · Published by YunFanLabs