Deck Calculator

Calculate how many decking boards you need based on deck area and board coverage.

How Does This Calculator Work?

The calculator divides your total deck area by the square footage one board covers once installed, rounding up since boards are sold whole.

Decking is typically sold as individual boards with a known coverage area once installed (accounting for board width and gap spacing). This calculator converts your total deck area into a board count.

Example Calculation

Composite Deck Example

A 200 sq ft deck, boards covering 1.33 sq ft each.

200 ÷ 1.33 ≈ 151 boards needed.

Frequently Asked Questions

How do I find my board's coverage area?

Multiply the board's width (including its typical gap spacing) by its length, in feet, and convert to square feet — or check your decking manufacturer's coverage chart.

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