FREE ONLINE CALCULATOR

Deck Calculator

Estimate decking rows and linear board feet from deck dimensions and board spacing.

✓ Instant results ✓ Editable inputs ✓ Formula explained

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CONSTRUCTION · TOOLS

MEASURE Enter project dimensions

ESTIMATE Calculate material volume

PLAN Check practical assumptions

CALCULATION TOOL

Deck Calculator

Change any value and calculate again.

Uses the values you enter. No account required.

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ABOUT THIS TOOL

When to use a deck calculator

Estimate decking rows and linear board feet from deck dimensions and board spacing.

All assumptions are visible and adjustable. Check rates and underlying data against original sources before making a decision.

HOW IT WORKS

The calculation

Board rows = ceil(deck width × 12/(board face width + gap)); total linear board feet = rows × deck length × (1 + waste%).

Read the full guide →

ASSUMPTIONS

Know the limitations

Assumes boards run the deck length, no butt joints and no rim/border waste; framing lumber is not included.

Results are estimates derived from your inputs.