Decking Calculator
Estimate deck boards and cost
Estimate how many deck boards (and the cost) you need for a deck area, based on the board dimensions.
Estimate deck boards and cost. Enter actual board width (e.g. a 6" board is ~5.5").
Deck Area
192
sq ft
Boards Needed
58
464 lin ft
Estimated Cost
$464.00
How to Use This Calculator
- Enter the deck length and width.
- Enter the board width and length.
- Optionally add a waste percentage.
- Enter the price per board.
- Review the boards needed, linear feet, and cost.
Why Use This Calculator?
- Ordering deck boards for a new deck.
- Comparing board widths and lengths.
- Budgeting a deck build.
Real-World Examples
A 16 × 12 ft deck, 5.5 in boards, 8 ft long, $8 each
Each board covers about 3.67 sq ft; with 10% waste, you need roughly 58 boards — about $464, plus fasteners.
Frequently Asked Questions
Should I use actual board width?
Yes. A nominal "6-inch" board is actually about 5.5 inches. Use the real width for accurate coverage.
What about the gaps between boards?
Small gaps for drainage barely change the count; the waste percentage typically covers them.
Does this include the framing or fasteners?
No — just the deck boards. Joists, hardware, and finish materials are figured separately.
Important Disclaimer
Estimates based on the board and deck dimensions you enter. Layout, gaps, and waste vary. Verify with your supplier before ordering.
Privacy
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