Honey-Do Squad mascotHoney-DoSquadMy List

Decking for a 12×12 Deck

A 12×12 deck is 144 sq ft — about 22 pressure-treated boards (5.5"×16') plus 2 box of deck screws. Adjust board size below for composite or wider boards.

Deck boards
22 boards
Deck area
144 sq ft
Decking boards
22 boards5.5"-wide × 16' PT, incl. 10% waste
Deck screws
2 boxes~504 screws (≈3.5/sq ft)
Decking cost (est.)
$504~$3.50/sq ft pressure-treated
Doing this for work? Estimate the whole job in minutes.
JRIQ turns plans and site photos into full material + labor estimates with AI — built by the team behind these calculators.
Try it free →

Want the full guide — tools, step-by-step, common mistakes and FAQ? See the Decking Calculator.

Other sizes

Decking for a 8×10 DeckDecking for a 10×10 DeckDecking for a 10×12 DeckDecking for a 12×16 DeckDecking for a 12×20 DeckDecking for a 14×16 DeckDecking for a 16×16 DeckDecking for a 16×20 DeckDecking for a 20×20 DeckDecking for a 12×24 Deck