Deck Board Calculator
Deck dimensions and boards
Results
For a 16 ft × 12 ft deck laid with 5/4x6 boards at a 1/4 in gap, bought as 16 ft boards with 10% waste, you'll need about 29 boards (26 rows).
Deck boards needed
29 × 16 ft boards
That's a typical order for a mid-size residential deck.
Ask the lumberyard about delivery — this quantity rarely fits a car, and yard delivery usually costs less than multiple trips. Order everything at once so the boards weather evenly from the same stock.
Rows of boards: 26 rows
Total decking incl. waste: 458 linear ft
Deck area: 192 sq ft