Deck Material List Calculators
Cut lists rather than prices: joists at their spacing, boards at their width, and the fasteners that follow from both.
There are 3 calculators here: 10x12 Deck Material List Calculator (the full material list for a 10 by 12 foot deck), 16x20 Deck Material List & Cost (full material list and cost for a 16 by 20 foot deck), and Deck Board & Joist Calculator (board count, joist count and framing for a deck).
They all work the same way: quantity first, then a waste allowance you can change, then a price built from verified figures and adjusted for your state. Cost is always a range rather than a single number, and every assumption behind it is printed on the page with its source and the date it was last checked.