Planning a new deck or resurfacing an old one? Our Decking Calculator helps you estimate the linear feet of material and number of boards required. It accounts for board width, spacing gaps, and waste, ensuring you order the right amount of lumber and fasteners.
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Decking Calculator
Calculate deck boards and screws needed
Deck Dimensions
Materials List
Enter deck dimensions to estimate materials
About Calculate Deck Boards and Fasteners
1
Measure Area
Enter the total length and width of the deck surface.
2
Select Boards
Choose your board size (e.g., 5.5" wide) and preferred length.
3
Set Gap
Specify the spacing between boards (usually 1/8" or 1/4").
Key Features
Board Count
Calculate exactly how many 8', 10', 12', or 16' boards you need.
Screw Estimator
Get a reliable estimate for the number of deck screws required.
Custom Spacing
Adjust board width and gap spacing for precision.
Frequently Asked Questions
You typically need 2 screws at every joist intersection. For standard 16" joist spacing, that's roughly 350 screws per 100 square feet.
The standard gap is 1/8 to 1/4 inch to allow for drainage and wood expansion.
For simple straight patterns, 5-10% is sufficient. For diagonal or herringbone patterns, plan for 15-20% waste.
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