Data Source and Methodology
This calculator uses the National Motor Freight Classification (NMFC) standards. All calculations are based on the density and stowability of the shipment.
The Formula Explained
Density =
(Weight in lbs) / ((Length in inches × Width in inches × Height in inches) / 1728)
Glossary of Terms
- Weight: The total weight of the shipment in pounds.
- Dimensions: The length, width, and height of the shipment in inches.
- Freight Class: A standardized classification system to categorize freight for shipping.
Frequently Asked Questions (FAQ)
What is freight class?
Freight class is a standardized classification system for categorizing freight based on factors like density, stowability, handling, and liability.
Why is freight class important?
Freight class helps determine shipping costs and ensures the proper handling of goods during transit.
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
Density = (Weight in lbs) / ((Length in inches × Width in inches × Height in inches) / 1728)
Variables and units
- T = property tax (annual or monthly depending on input) (currency)
Sources (authoritative):
- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - FTC — Consumer advice — consumer.ftc.gov · Accessed 2026-01-19
https://consumer.ftc.gov/
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
- Initial audit spec draft generated from HTML extraction (review required).
- Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
- Confirm sources are authoritative and relevant to the calculator methodology.