Deck Board Quantity Calculator

Calculate decking boards, screws, and fasteners per IRC R507

Standard Deck Boards (Perpendicular)

Deck Board Estimate

0
Boards Needed
12' boards
0
Linear Feet
of decking
0 m
0
Deck Area
sq ft
0 m²
0
Fasteners
deck screws
0
Screw Boxes
@ 350/box
0
Board Rows
across width
IRC R507.2.2: Deck boards require 2 fasteners at each joist (or 1 hidden fastener per manufacturer). Use stainless steel or coated fasteners for treated lumber.

Diagonal Pattern (45°)

Diagonal Deck Estimate

0
Boards Needed
boards
0
Linear Feet
of decking
0
Deck Area
sq ft
0
Deck Screws
2.5" coated
Tip: Diagonal patterns create more cuts and waste (15-20% typical). Plan board layout to minimize short pieces at corners.

Picture Frame Border

Picture Frame Estimate

0
Border Boards
12' boards
0
Field Boards
12' boards
0
Total Boards
all
0
Border LF
linear feet
0
Deck Screws
total
0
Deck Area
sq ft
Note: Picture frame requires blocking between joists at border-to-field transitions. Consider contrasting color for border boards.

Deck Board Reference

Material Nominal Actual Width Coverage/LF Max Joist Span
Pressure Treated5/4 x 65.5"0.458 sq ft24" O.C.
Cedar/Redwood5/4 x 65.5"0.458 sq ft16" O.C.
Composite1 x 65.5"0.458 sq ft16" O.C.
Composite Wide1 x 87.25"0.604 sq ft16" O.C.
Ipe/Hardwood5/4 x 65.5"0.458 sq ft24" O.C.
2x6 PT2 x 65.5"0.458 sq ft24" O.C.