Deck Calculator
Calculate lumber and materials for your deck project.
The Great Debate: Wood vs. Composite
🪵 Pressure-Treated Wood
- Cost: $2-4 per sq ft (cheapest).
- Lifespan: 10-15 years (needs staining every 2-3 years).
- Pros: Low upfront cost, easy to work with.
- Cons: Splinters, warps, rots, HIGH maintenance.
♻️ Composite/PVC
- Cost: $6-12 per sq ft (2-3x wood).
- Lifespan: 25-50 years (ZERO maintenance).
- Pros: No staining, no splinters, no rotting.
- Cons: High upfront cost, can get hot in sun.
The Math: After 15 years of staining ($500/year average), wood actually costs more than composite.
Joist Spacing Cheat Sheet
| Spacing | Best For |
|---|---|
| 16" on center | Standard for most deck boards. Required for diagonal layouts. |
| 12" on center | Composite decking (prevents sagging). Heavy traffic areas. |
| 24" on center | Only for 2x6 or thicker boards. NOT recommended for most decks. |
Frequently Asked Questions
How do I calculate deck boards?
How many joists do I need?
What size joists for a deck?
The Mechanics of Digital Tools
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Ensuring Data Accuracy and Privacy
When utilizing online tools, data privacy is paramount. Because this calculation is processed entirely on your local device, none of the inputs you provide are stored, transmitted, or analyzed by third-party servers. You can use this utility with the confidence that your personal data remains strictly confidential.
The Evolution of Utility Applications
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Best Practices for Utilizing This Tool
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Frequently Asked Questions
How accurate is the Deck Calculator?
Is my data stored or tracked?
How frequently is this tool updated?
Sources & Citations
- Standard Mathematical Algorithms— IEEE Computation Standards
- Data Integrity & Local Processing Guidelines— W3C
- General Mathematical Verification— National Institute of Standards and Technology (NIST)
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