Material estimates only
Results are mathematical material estimates based on the dimensions, units, waste, compaction, density, product yield, and rounding assumptions entered or shown. Exact volume and order volume are intentionally separate. Real jobs may require different quantities because of excavation variation, spillage, site conditions, supplier practices, product variation, or measurement error.
Concrete Cal does not determine structural design, slab thickness, concrete strength, reinforcement, footing depth, soil suitability, drainage, load capacity, code compliance, permit requirements, or safe construction methods. Consult qualified local professionals, suppliers, and authorities for decisions in those areas.
Your responsibility
You are responsible for checking every measurement, unit, assumption, source date, product yield, bag size, density, price, and rounded purchase quantity before ordering or building. Manufacturer and supplier information can change, and a configuration shown in the tool is not a recommendation for a particular product or method.
Do not rely on this site in place of job-site inspection or professional advice. Stop and resolve any result that appears inconsistent, incomplete, or unsafe. Use of the calculator does not create a contractor-client, engineer-client, supplier, or advisory relationship.
Local storage and availability
Saved projects are stored on this device in the current browser profile. They are not cloud backups. Browser cleanup, private mode, device loss, software changes, storage limits, or corruption may remove them. Print or copy any plan you need to retain independently.
The service may be changed, interrupted, corrected, or withdrawn without notice. We aim to keep calculations deterministic and tested, but uninterrupted access, compatibility with every browser, and permanent retention of local data are not guaranteed.
No warranty and limitation
The site is provided on an as-is and as-available basis to the extent permitted by law. No warranty is made that a result is suitable for a particular project, purchase, structure, jurisdiction, or site condition.
To the extent permitted by applicable law, Concrete Cal and its operator are not responsible for indirect, incidental, special, consequential, or procurement losses arising from use of or inability to use the site. Rights that cannot legally be excluded remain unaffected.
Acceptable use and contact
Do not misuse the site, interfere with its operation, attempt unauthorized access, distribute malicious code, or republish substantial site content as your own. Original page copy, interface content, and branding remain protected by applicable intellectual-property rules; factual formulas and third-party sources retain their respective status.
By using the site, you agree to these terms. If you do not agree, do not use the service. Questions can be sent to [email protected]. These terms may be updated, with the latest reviewed date shown above.