About this site
Gravel Calculators is a small, focused collection of tools for estimating gravel and aggregate quantities — built to be fast, honest, and private.
What this website is
A free reference and calculator site for one job: helping people work out how much gravel, crushed stone, sand, or related aggregate a project needs, and roughly what it will cost. It is an independent personal project — not a supplier, a contractor, or a store — so it doesn't sell anything, and it has no reason to inflate an estimate.
Purpose
Material estimation questions look simple ("how much gravel for a 20×10 foot area?") but the answers vary with shape, depth, material, and units. The purpose of this site is to make that math instant, show the formula behind every result, and explain the limits of the answer — rather than hiding the calculation and presenting a number as certain.
Tool philosophy
- The tool comes first. Every page leads with a working calculator, not an article. Content supports the tool.
- Show the work. Every result displays the formula and the exact density figure used, so results can be checked by hand.
- Be honest about limits. Results are labeled as estimates everywhere, with compaction, moisture, and supplier rounding called out — never presented as guarantees.
- Stay focused. The site covers gravel and aggregate estimation only. If a topic doesn't belong to that subject, it doesn't get a page here, no matter the search interest.
Privacy philosophy
The calculators run entirely in your browser using JavaScript. The dimensions you enter are never sent to a server, logged, or shared, and they never appear in URLs. The site uses two anonymous, cookieless-or-standard analytics services (GA4 and Ahrefs Web Analytics) to count tool usage — never the values you enter. See the privacy policy for the full detail, including what the hosting provider logs as a matter of course.
How the tools are developed
The site is plain HTML, CSS, and vanilla JavaScript — no frameworks, no backend, no external scripts. One shared calculator engine powers every tool, configured per page with the material preset and defaults that match that page's subject. Every calculator's formulas and unit conversions were verified against hand calculations before publishing, including edge cases such as zero and negative inputs.
How the density figures were sourced
The densities used (for example, gravel at roughly 1.4–1.5 tons per cubic yard, pea gravel at about 1.49, crusher run at about 1.6) are typical loose, uncompacted values drawn from widely published material references and common supplier specifications. They sit within the ranges you'll find quoted across the industry. Because real figures vary with gradation, moisture, and compaction, every page states the exact value it uses, notes the variance, and recommends confirming final quantities with your own supplier. The methodology is described further in the editorial policy.
Content standards
No fabricated statistics, no invented experts, credentials, awards, or testimonials. Guidance that varies by project (depths, materials) is presented as typical practice, not rules. When something genuinely doesn't work — pea gravel on a driveway, for instance — the pages say so plainly.
Maintenance
Pages are reviewed and corrected as issues are found or materials guidance changes. The "last updated" date on a page changes only when its content was genuinely reviewed or revised. Found something wrong? Please get in touch — corrections are welcome and credited to the process, not buried.
Last updated: September 26, 2026