Decking boards
How many boards cover a deck width, and the linear metres of those boards.
Formula. board pitch = (board width + gap) in metres; boards = round up(deck width ÷ pitch); linear metres = boards × deck length
Assumptions
- Boards run the length of the deck. The width is the direction you count boards across.
- The default board is 90 mm wide with a 5 mm gap. Change both.
- The count is rounded up. It does not allow for joins along a long deck, picture frames or breaker boards.
- Joists, bearers, footings and a balustrade are not in this count.
Results are quantities. This calculator does not produce a price.