Deck Calculator
Boards, joists and cost for a deck.
Enter your values
Results update instantly as you type — no submit needed.
Results
- Deck boards (16 ft)
- 28
- Board rows
- 26
- Joists at 16 in centres
- 13
- Deck area
- 192 sq ft
- Estimated board cost
- $504.00
Quick answer
Deck board count depends on deck area, board width and the gap between boards, plus joists at 16 inch centres.
How to use the Deck Calculator
- 1Enter your deck dimensions.
- 2Enter board width and spacing gap.
- 3Add 5% for cuts and defects.
Frequently asked questions
What gap should I leave?
1/8 to 1/4 inch for pressure-treated boards that will shrink as they dry.
How deep are footings?
Below your local frost line — often 36–48 inches in cold climates.