FREE DIY ESTIMATOR
Deck Calculator
Estimate decking board count, row count, waste allowance, and primary board cost for a rectangular deck.
How to estimate deck boards
Enter the deck length and width along with the actual board width and board length. The calculator estimates how many boards are needed and adds your selected waste allowance.
Planning tips
- Measure the finished deck footprint.
- Confirm the actual installed width of your decking boards.
- Choose board lengths that suit your framing and layout.
- Include extra material for cuts, defects, and future repairs.
- Check manufacturer spacing and fastening requirements.
What is not included
Framing lumber, footings, railings, stairs, fascia, fasteners, joist tape, permits, and structural design are separate from the basic decking-board estimate.
Rather have a pro build it?
If your deck project is bigger than you want to tackle yourself, you can send us the basic project details and request a free contractor quote when coverage is available in your area.
Plan beyond the boards
Use the Project Planner to add framing, fasteners, trim, and other supplies to your project list.