Deck Cost Calculator
Use this free deck cost calculator to estimate the cost of building a deck from project size, decking material, framing, railing, stairs, labor and waste. See the estimated total project cost and cost per square foot.
Deck size
Decking and framing
Railing
Stairs and labor
How to calculate the cost of building a deck
Start by measuring the planned deck length and width. Multiply the two dimensions to calculate the total deck area in square feet.
Enter the decking material cost per square foot. This can represent wood, composite or another decking product. The calculator adds your selected waste allowance to the decking material cost.
Add the estimated framing cost per square foot for joists, beams, posts and related structural material. You can then add railing length, stair costs and labor separately.
Any permits, hardware, delivery, demolition, lighting or other project expenses can be entered under other project costs.
If you first need to estimate the number of deck boards, use the Deck Material Calculator. For deck stairs, use the Stair Stringer Calculator.
Deck cost estimate breakdown
Cost per square foot
Deck cost per square foot calculator
The calculator divides the full estimated project cost by the total deck area to show an estimated cost per square foot. This makes it easier to compare different deck sizes, materials or project options.
Material planning
Decking material and waste
Cutting, board defects and layout adjustments can increase the amount of decking material required. Enter a waste percentage to include an allowance in the decking portion of the estimate.
For board quantity and linear-foot planning, use the Deck Material Calculator.
Deck cost calculator FAQs
How do I calculate the cost of building a deck?
Calculate the deck area, estimate decking and framing costs, then add railing, stairs, labor, waste and other project expenses.
How is deck cost per square foot calculated?
Divide the estimated total project cost by the total deck area in square feet.
Does this calculator include labor?
Yes. Enter an estimated labor cost per square foot and it will be added to the total project estimate.
Can I calculate railing cost?
Yes. Enter the total railing length and the estimated cost per linear foot.
Can I include deck stairs?
Yes. Enter the number of stair sets and an estimated cost for each set.
Does the calculator include waste?
Yes. The waste allowance is applied to the decking material portion of the estimate.
Can I use this for wood or composite decking?
Yes. Enter the material cost per square foot for the decking product you plan to use.
Is this an exact contractor quote?
No. This is a planning estimate. Actual prices vary by materials, location, design, labor, site conditions and contractor.
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