Contact

Write to hello@howmanybags.net with the page and the figure. Reports of a wrong number are checked against the source named on the page, and the page is corrected where the report is right.

The most useful messages

A calculator result that looks wrong, with the inputs you used and the number you expected. A figure on a page that disagrees with a document you have, with a link to the document. A material, bag size or board size that is common where you live and missing from a list. Each of those gets checked against the sources and the test suite, and the page is corrected where the report holds up.

What the site cannot do

The team does not design slabs, footings, decks or driveways, give quotes, or recommend contractors or products. For a structural question, the right person is a licensed engineer or your building department; for a price, your local supplier.

Privacy questions

Questions about the data the site handles go to the same address. The privacy page describes what is collected and how to ask for it to be deleted.