Deck Calculator
Calculate deck materials, boards, joists, and cost. Free online deck building calculator.
Enter Deck Dimensions
Standard spacing is 16 inches on center
Common widths: 4 in, 5.5 in, or 6 in
Results
Enter your deck dimensions and click Calculate to see material estimates.
How to Use This Calculator
- 1Enter the length and width of your deck in feet.
- 2Set joist spacing and decking board width.
- 3Toggle cost estimation and enter price per square foot.
- 4Click Calculate to see material quantities and total cost.
Common Uses
- ✓Ground-level decks
- ✓Raised decks
- ✓Pool decks and surrounds
- ✓Balconies and walkways
- ✓Rooftop terraces
Related Guides
How to Build a Deck
Step-by-step guide to planning and building your own deck, from permits to finishing.
Deck Materials Calculator
Learn how to calculate materials needed for your deck project with examples and formulas.
Deck Cost Estimation
Complete breakdown of deck building costs, including materials, labor, and permits.
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This calculator provides estimates only. Actual material requirements may vary based on design, local building codes, and site conditions. Always consult with a professional builder or engineer for critical projects.