Terms of service
Last updated: August 13, 2026
These Terms of Service govern your use of DirtMath (the "Site"). By using the Site, you agree to these terms. If you do not agree, please do not use the Site.
Acceptance of terms
DirtMath provides free online calculators and related content for informational purposes. Your use of the Site is conditioned on your acceptance of and compliance with these terms.
Calculators are estimates
All calculations on the Site are planning estimates. They do not replace professional advice, engineering specifications, or supplier confirmation. Material density, coverage, moisture, compaction, and regional pricing vary. Always confirm quantities with your supplier or contractor before ordering.
Use of the site
You may use the Site for lawful, personal, or commercial planning purposes. You may not:
- Scrape, copy, or redistribute large portions of the Site without permission.
- Interfere with the Site’s operation or security.
- Use the Site for unlawful, fraudulent, or harmful purposes.
Intellectual property
The content, code, design, and branding on DirtMath are owned by the site operator or licensed for use. You may not reproduce, modify, or distribute our content without written permission. Calculator formulas are general knowledge; specific content, wording, and implementation are protected.
Affiliate links and ads
DirtMath participates in the Amazon Services LLC Associates Program and may display Google AdSense ads. Some links to products are affiliate links. We may earn a commission if you make a purchase through an affiliate link, at no extra cost to you. Affiliate links do not affect calculator results or recommendations.
Third-party links
The Site may link to external websites. We are not responsible for the content, accuracy, or practices of any third-party site. Visiting third-party links is at your own risk.
Limitation of liability
To the fullest extent permitted by law, DirtMath and its operator are not liable for any direct, indirect, incidental, or consequential damages arising from your use of the Site or reliance on any calculation, estimate, or recommendation. This includes errors in order quantities, project costs, or product suitability.
Changes to these terms
We may update these Terms of Service from time to time. Changes will be posted on this page with a revised "last updated" date. Continued use of the Site after changes means you accept the updated terms.
Governing law
These terms are governed by the laws of the United States and the State of Delaware, without regard to conflict of law principles.
Contact us
For questions about these Terms of Service, email us at contact@dirtmath.com.