Decking Calculator
Plan your deck project by calculating materials, costs, and requirements
Our decking calculator helps you estimate materials and costs for your deck project. Follow these steps:
- Enter your deck's length and width in feet
- Specify the board width (standard is 5.5 inches)
- Input the board length (typically 12 feet)
- Set the desired board spacing (recommended 1/4 inch)
- Enter the price per board in your area
The calculator will provide estimates for total deck area, number of boards needed, joists required, deck screws, and total cost.
Essential materials for deck construction include:
- Deck boards (surface material)
- Floor joists (support structure)
- Deck screws (fasteners)
- Post anchors and hardware
- Concrete for footings
- Flashing and waterproofing materials
- Railings and balusters (if required)
Remember to add 10% extra material for waste, cuts, and potential replacements.
- Check local building codes and obtain necessary permits
- Consider the deck's intended use and traffic patterns
- Plan for proper drainage and ventilation
- Account for seasonal weather conditions
- Include safety features like railings where required
- Consider sun exposure and shade requirements
- Plan for future maintenance and accessibility
Several factors affect the total cost of your deck project:
- Material choice (pressure-treated lumber, composite, etc.)
- Deck size and complexity
- Additional features (stairs, railings, built-in seating)
- Site preparation requirements
- Labor costs if hiring professionals
- Permit fees and inspections
- Maintenance costs over time
Why is board spacing important?
Proper board spacing allows for drainage, ventilation, and wood expansion/contraction with temperature changes. The recommended gap is typically 1/4 inch.
How accurate are the material estimates?
Our calculator provides estimates based on standard construction practices. We recommend adding 10% extra material for waste and cuts. Actual requirements may vary based on your specific design and local building codes.
Do I need a building permit for my deck?
Most jurisdictions require permits for deck construction, especially for attached decks or those above a certain height. Check with your local building department for specific requirements.