Editorial policy
Last updated .
Gravel Calculators publishes calculators and guides for people ordering material. A page should tell you the rule it is using and point at the document that rule came from. If that document was not opened, and the sentence was not found on it, the sentence does not go on the page.
What gets cited
Product facts come from the maker's spec sheet, install guide, or technical note. Test methods and unit specs come from the standards body, or from a Concrete Masonry and Hardscapes Association note that quotes the standard. Code limits come from the code text, or from a public agency page that reprints the section. The formula a calculator uses is the formula in that calculator, written out on how we calculate.
A table that sits behind a paywall is not retyped from memory. If the free page does not show the number, the guide leaves that number out.
Checking and updates
Before a guide is published, each external link is opened and the cited phrase is confirmed on that page. Worked numbers are recomputed with the same rounding the matching calculator uses. The date at the top of a page is the date that page last changed, and a later edit moves the date with it.
What you type into a calculator stays in the browser. The privacy policy covers that, and it names the AdSense publisher id and the analytics id this site loads. Guides use those same ad slots. They do not add a different ad script.
Prices and design limits
Guides do not print a price. On a calculator that has a cost line, the price is a number you type, or an example the page labels as an example. A block count, a gravel volume, or a code excerpt is a planning aid. It is not a soil report, and it is not an engineer's stamp.
Corrections
If a figure, a link, or a date is wrong, email contact@gravelcalculators.com. That address is the one on the privacy policy. Include the page URL and the sentence that looks wrong. A confirmed fix updates the page and the date at the top.