Terms of Use

Plain-language terms for using this website. By using the site, you accept them.

Last updated: September 19, 2026

What this site provides

Free, browser-based calculators that estimate gravel, aggregate, and related material quantities and costs, plus explanatory content. The site is provided for general informational and planning purposes.

Estimates are not guarantees

Every result produced by the calculators is an estimate. Real-world material quantities depend on factors the tools cannot know: compaction, moisture, uneven or sloped ground, waste, supplier measurement and rounding, and local material differences. A calculated quantity will not exactly match any real project's material needs. Always confirm final quantities, pricing, and material suitability with your supplier or contractor. Nothing on this site is engineering, construction, or professional advice.

No warranty

The site and its tools are provided "as is" and "as available", without warranties of any kind, express or implied, including accuracy, fitness for a particular purpose, or uninterrupted availability. Formulas and figures are checked with care, but errors can exist — if you spot one, please report it via the contact page.

Limitation of liability

To the maximum extent permitted by law, the site owner is not liable for any loss or damage arising from use of the site or reliance on its estimates — including over- or under-ordering materials, project costs, or scheduling outcomes. Decisions based on the tools' output are your own.

Acceptable use

You may use and link to the site freely, including for personal and commercial project planning. Please don't attempt to disrupt the site, abuse it in ways that impose unreasonable load, or misrepresent its content as your own or as professional advice.

Ownership

The site's text, design, and code are owned by its author. You're welcome to quote or reference it with attribution and a link.

Changes

These terms may be updated as the site evolves; the "last updated" date above reflects the current version. Continued use of the site after changes means you accept the updated terms.