Terms
Terms of use
Use the calculators as transparent planning aids, not as engineering documents or bids.
Planning estimate only
Outputs depend entirely on the measurements, density, thickness, waste, and prices entered. They may differ from delivered quantity, compacted yield, final scope, invoice, or site conditions.
No professional or contractual advice
The site does not provide engineering, construction, legal, safety, tax, or contracting advice. A result is not a pavement design, specification, order, offer, warranty, or contractor quote.
Your responsibility
Verify measurements, mix, compacted density, pavement design, local requirements, supplier order rules, and complete contractor scope with qualified local professionals before purchasing material or authorizing work.
Availability and changes
The site may correct formulas, sources, validation limits, or explanatory text. Important corrections should be documented with the review date. For implementation details, read the methodology.