Craft

Deck Calculator

Estimate materials for a ground-level deck frame and surface: decking boards from board width and gap, joist count from spacing, plus screws. Prices per board are optional for a cost estimate.

Deck Calculator

Deck & Fence

ft
ft
in
in
ft
in
%

Decking boards

29× 16 ft

458 lin ft total

Framing (joists) linear

192 lin ft

16 joists incl. rim @ 16 in OC

Deck screws

672≈ 1.4 lb (5 lb boxes: 2)

Deck area

192 ft² · 17.8 m²

Calculation breakdown

  1. 1Rows: ⌈3.66 ÷ (0.14 + 0.006)⌉ = 26
  2. 2Board linear: 26 × 4.88 × 1.10 = 139.5 m
  3. 3Boards: ⌈139.5 ÷ 4.88⌉ = 29
  4. 4Joists: ⌈4.88 ÷ 0.406⌉ + 1 + 2 rim = 16
  • Ledger attachment, beams, posts and footings follow structural requirements — consult local code and permits.
  • Structural outputs are preliminary estimates, not approved construction designs.

Rows = ⌈Deck width ÷ (Board width + Gap)⌉.

Board linear = Rows × Deck length × (1 + Waste) · Boards = ⌈linear ÷ board length⌉.

Joists = ⌈Deck length ÷ spacing⌉ + 1 (+ 2 rim). Screws ≈ 3.5 per ft² (≈475 screws/lb).