Effective date:
Planning use only
The calculators provide mathematical material estimates from the inputs shown. They are not construction documents, structural or geotechnical design, code approval, a mix design, a supplier order, an installed-cost quote, a bid, or a statement that a product is suitable for a particular use.
Your responsibility
You are responsible for checking field dimensions, units, geometry, approved plans, specifications, local requirements, product identity, current instructions, declared yield, quote scope, fees, tax, availability, order increments, and final purchase quantity. Consult qualified project parties where the decision affects safety, compliance, performance, or significant cost.
Availability and changes
The site is provided on an as-available basis. Formulas, sources, product data, features, and these terms may be corrected or updated. External sources can move or change without notice. No guarantee is made that the service will be uninterrupted or that a calculation will fit circumstances not represented by its inputs and stated assumptions.
Trademarks and independent status
Third-party names and marks belong to their respective owners and are used only for identification or source attribution. Their appearance does not imply sponsorship, endorsement, affiliation, or official status.
Liability boundary
To the extent permitted by applicable law, the site and its operator are not liable for purchasing, construction, delay, loss, damage, or other consequences arising from unchecked inputs, unavailable context, changed sources, or reliance on an estimate beyond its published scope. Nothing in these terms excludes rights or liabilities that cannot lawfully be excluded.
Questions about these terms may be sent through the contact page.