How to use this deck board layout calculator
A deck board layout influences both the visual result and the order quantity. This calculator counts straight rows across a rectangular deck. It is useful for comparing a 5.5-inch face board with other common sizes before deciding on a design.
Step-by-step instructions
- Measure your width perpendicular to board direction.
- Enter the actual board face width and gap, not nominal lumber dimensions.
- Choose stock length and waste percentage.
Calculation formula
Important assumptions and limitations
Every row runs the full deck length; stock equivalents are bulk purchasing estimates, not an optimised cut plan. Expansion and spacing recommendations vary by material.
For material orders, confirm package yields, stock sizes and installation instructions with the actual manufacturer or supplier. Your building department determines the applicable local code; a quantity estimator is not a structural design or permit approval.
Frequently asked questions
Is a 2x6 deck board really 6 inches wide?
Nominal lumber sizes usually differ from actual finished sizes. Measure your actual material or refer to the manufacturer.
Can boards be joined end-to-end?
Sometimes, with correctly designed support and fastening. This estimator does not specify splice or stagger placement.
We publish formulas and assumptions so you can verify an estimate. Learn about our methodology or report an issue.