Deck Cost Calculator
Estimate outdoor deck construction costs for pressure-treated wood, composite, or hardwood decking.
Enter Your Dimensions
US • ftHow We Calculated This
• Remember to obtain municipal building permits and check setback requirements before digging footings.
Formula & Volumetric Method
Total Cost = (Length ft × Width ft) × Material Rate ($/sq ft). Framing represents ~40% and Decking ~60%.
Calculations are performed strictly using standard civil engineering constants. Volumetric outputs are normalized to true compaction rates, ensuring purchased quantities match jobsite yields.
Jobsite Engineering Guidelines
- Pressure-treated pine averages $20–$30/sq ft installed; composite like Trex is $45–$65/sq ft; exotic hardwood (Ipe) is $65–$90/sq ft.
- Joist spacing should be 16" on-center for standard wood planks and 12" on-center for composite boards.
Frequently Asked Questions
How accurate is the Deck Cost Calculator for ordering materials?
Our calculations match standard store packaging sizes in the US, Canada, UK, and Australia. We include a safety waste buffer (default 8% to 12%) so you do not run short due to uneven ground or spillage.
Why should I add extra for waste when ordering?
Uneven ground, cutting scrap, and leftover mix in the wheelbarrow or mixer drum consume an extra 5% to 15% of material. Ordering only the exact measurement usually leaves you short, which can lead to expensive extra delivery fees.
Does this calculator support both Imperial and Metric units?
Yes. You can switch between US Customary (feet, inches, cubic yards, pounds), Canadian units, UK metric, and Australian standards using the region selector in the header or the unit dropdown on each input.