Calculation Methodology & Sources

Volume units and formulas

One international yard equals exactly 0.9144 meters. A cubic yard contains exactly 27 cubic feet and 46,656 cubic inches. One cubic yard is exactly 0.764554857984 cubic meters. For rectangular shapes measured in feet, cubic yards = length × width × depth ÷ 27.

When depth is supplied in inches and horizontal dimensions are in feet, cubic yards = length × width × depth ÷ 324. This also works when length × width is replaced by a known area in square feet.

Mass estimates and densities

US short tons are calculated by multiplying cubic yards by the selected bulk density in US short tons per cubic yard. The displayed material presets are illustrative; bulk density varies with moisture content, material composition, particle size and state of compaction.

Supplier-provided product density is preferred for order planning. If the project specifies bank, loose or compacted volumes, apply only project-appropriate conversion factors.

Rounding, extra allowance and transparency

Calculations retain full JavaScript floating-point precision and round only the displayed output. The optional allowance adds a selected percentage to geometric volume and is not a substitute for a calculated swell or compaction factor.

Materials, methods and local conditions vary. Always verify critical quantities with suppliers, contractors or relevant specialists before buying materials.

Reference standards and further reading

Measurement conversion definitions can be checked against the National Institute of Standards and Technology, Office of Weights and Measures: https://www.nist.gov/pml/owm . Construction material properties and performance must be sourced from the actual supplier or project specification.