Composite Decking
Calculate Composite Decking instantly with the exact formula and a worked example.
Composite Decking
Deck aream²
Board lengthm
Board widthmm
Gap between boardsmm
Joist spacingmm
Cutting allowance%
Composite boards
73pcs
Boards per m²
2.21pcs
Rails / joists
75m
Hidden clips
497pcs
More about: Composite Decking
What it calculates
The “Composite Decking” calculator computes Composite boards in pcs from 6 parameters: deck area (m²), board length (m), board width (mm), gap between boards (mm), joist spacing (mm), cutting allowance (%).
Used in design, material estimation, and structural calculations.
Example calculation
With parameters Deck area = 30 m², Board length = 3 m, Board width = 146 mm, Gap between boards = 5 mm, Joist spacing = 400 mm, Cutting allowance = 10 % the result is 73 pcs (Joists and fasteners — without allowance).
How to use
- Enter deck area, board length, board width, gap between boards, joist spacing and cutting allowance — each field above is adjustable with a slider.
- Composite boards (pcs) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Composite Decking calculated?
The Composite Decking calculator computes Composite boards (in pcs) from deck area, board length, board width, gap between boards, joist spacing, cutting allowance. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Composite Decking calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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