Terms of Service & Disclaimer
Last updated: July 2, 2026
Estimates only — not a substitute for professional judgment
Every calculator on this site produces an estimate based on the numbers you enter and standard industry formulas. Always verify quantities, structural requirements, and code compliance with a licensed contractor, structural engineer, or your local building department before purchasing materials or beginning construction.
Acceptance of Terms
By using FreeConstructionCalc.com (the "Site"), you agree to these Terms of Service. If you don't agree, please don't use the Site.
What This Site Provides
This Site offers free calculators for estimating construction material quantities — including concrete, aggregate, rebar, excavation, and related site work. These tools are provided for general planning and educational purposes only.
No Professional or Engineering Advice
Nothing on this Site constitutes structural engineering, architectural, or professional construction advice. Calculations are based on standard formulas and the values you enter — they do not account for local building codes, soil conditions, load requirements, permit requirements, or site-specific engineering factors that can materially affect what your project actually requires.
For anything involving structural loads, foundations, retaining walls over a few feet in height, drainage, or any work requiring a permit, consult a licensed engineer or contractor before proceeding. Some jurisdictions require a licensed professional's stamp on plans regardless of project size.
Accuracy of Estimates
We aim for calculations to reflect standard industry formulas correctly, but we make no guarantee that any estimate is complete, precise, or suitable for your specific project. Real-world factors — material waste, supplier rounding, site conditions, measurement error — can cause actual needs to differ from the estimate shown. Always order a reasonable safety margin and confirm quantities with your material supplier before a purchase.
No Liability for Project Outcomes
To the fullest extent permitted by law, FreeConstructionCalc.com and its owner are not liable for any loss, damage, cost, or expense — including but not limited to material shortages, overages, structural failure, project delays, or injury — arising from reliance on any calculation, estimate, or content provided on this Site. You use these tools at your own risk and remain solely responsible for verifying all figures before acting on them.
Your Data Stays Yours
All calculations run locally in your browser. Numbers you enter are never transmitted to, stored on, or accessible from our servers. See our Privacy Policy for details on cookies and analytics.
Advertising
This Site is supported by advertising, including Google AdSense. We are not responsible for the content, products, or services offered by third-party advertisers or the affiliate links included on this Site. Some links on this Site are affiliate links, meaning we may earn a commission if you make a purchase — at no additional cost to you.
Intellectual Property
The design, code, and original content of this Site are owned by FreeConstructionCalc.com and may not be copied or reproduced without permission. You're welcome to link to this Site or share its calculators.
Changes to These Terms
We may update these Terms from time to time. Continued use of the Site after changes are posted means you accept the updated Terms.
Contact
Questions about these Terms can be directed through the contact information available on our homepage.