Outdoor calculator
Deck Board Calculator
Estimate deck boards from deck size, board width and spacing.
Your measurements
Estimated result
Deck area0 sq ft
Board rows0
Linear feet incl. waste0 ft
Planning estimate only. Check product specifications, site conditions and local codes before ordering or building.
Deck board formula
Board rows = deck width ÷ (board width + gap). Linear feet = board rows × deck length, then add waste.
Planning notes
This calculator estimates the surface decking rather than joists, beams or footings. Make sure the deck dimensions match the direction in which the boards will run.
- This estimates decking surface boards, not framing.
- Board orientation changes which deck dimension drives the number of rows.
Keep calculating
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