Decking, Fencing & Timber calculator
Deck Board Calculator
Calculate deck-board rows and total linear board requirement from deck dimensions, board width, gap and waste.
Calculate deck-board rows and total linear board requirement from deck dimensions, board width, gap and waste. Enter the project measurements first, then replace any default material or performance value with data for the product you intend to use. Check board width, gaps and layout carefully. Use the actual installed board width and intended gap. Picture frames, diagonal boards, breaker boards and complex edges increase offcuts.
What you need to enter
The Deck Board Calculator uses the following project information to calculate the result.
- Deck length
- Deck width
- Board width
- Gap between boards
- Waste (%)
Calculator result
Deck area and board quantity / linear length
How the Deck Board Calculator works
This page is built around uses effective board coverage including gap. Applied to deck board count across a measured deck including board gaps, the engine first converts compatible measurements to a common basis and then calculates deck area and board quantity / linear length. Verify board width, gaps and layout before treating the output as a buying, sizing or set-out figure.
Deck Board Calculator worked example
Deck Board Calculator example: across a 3.6 m deck width, 120 mm boards with 5 mm gaps use a 125 mm installed module. Divide the deck width by that module to estimate board rows, then multiply by the board run and add waste. This example shows the arithmetic only; on a live job, review board width, gaps and layout before turning the result into an order or final size.
Important calculation assumptions
For deck board count across a measured deck including board gaps, use the actual installed board width and intended gap. Picture frames, diagonal boards, breaker boards and complex edges increase offcuts.
Frequently asked questions
Which inputs are most important in the Deck Board Calculator?
Measure deck length and width and enter installed board width plus the planned gap. Add waste for direction changes and edge cuts. Those entries form the basis for estimating deck board count across a measured deck including board gaps.
When should I pay extra attention to board width, gaps and layout in the Deck Board Calculator?
For the Deck Board Calculator, use project-specific values for board width, gaps and layout. Use the actual installed board width and intended gap. Picture frames, diagonal boards, breaker boards and complex edges increase offcuts.
How should I turn the Deck Board Calculator result into an order quantity?
Take the Deck Board Calculator's board-row/length result and map it to the stock lengths available from your supplier. Allow separately for picture-frame borders, breaker boards and any board direction that creates unusable offcuts.