Corrections to the math are welcome. If a count on a calculator disagrees with a careful hand tally, say which page, which inputs, and what you got. The formulas are on the pages themselves.
DeckBoardCalc cannot pull a permit, inspect a ledger, or tell you that a footing is deep enough. For those questions, use your building department or a builder who will stand behind the work. The terms say the same thing in longer form.
Advertising questions belong with the privacy policy, which links to Google’s ad policies. DeckBoardCalc does not sell a deck kit and does not take orders.