Contact

Spotted a wrong price range, a bad density figure, or a bug in a calculator? Want a new calculator or language added? Let us know.

Email

GravelCalc is a small, static site with no support team on staff — we read every message, but replies aren't instant.

Bug reports — which calculator, what you entered, and what went wrong.
Data corrections — a price range or material density that's off for your region, ideally with a source.
Feature requests — a calculator, material, or language you'd like to see added.

For how we handle (or rather, don't collect) your data, see the privacy policy.