Methods and Sources
This page lists each formula on the site, where it comes from, and where it stops being reliable.
How We Build a Calculator
Every number and formula comes from a source we opened while building the page. Each worked example matches what the calculator returns.
Formulas and Sources
This table grows as calculators go live.
| Calculator | Formula | Source | Limits |
|---|---|---|---|
| Cubic Yard | Length x width x depth / 27 | NIST Handbook 44, Appendix C: 27 cubic feet = 1 cubic yard | Assumes an even depth. |
Corrections
If you find an error, tell us, and we will check it against the source.