Concrete & Decking: How to Calculate Price Per Square Foot for Outdoor Projects
Planning a patio or deck? Learn how to calculate the price of concrete per square foot and estimate composite or wood deck costs accurately.
Deciding between pouring a concrete patio or building a raised deck usually comes down to one brutal reality: the budget. Getting quotes from contractors can be dizzying because they rarely break down the cost in a way that lets you compare apples to apples. You see a $4,500 quote and wonder if you're getting scammed.
The solution is to normalize the math. By calculating the concrete price per square foot and the deck price per square foot, you can clearly see which outdoor upgrade gives you the most space for your dollar. Let's break down the formulas so you don't get taken for a ride.
How to Calculate the Price of Concrete Per Square Foot
Pouring concrete isn't just about buying bags of cement; it involves grading the land, building forms, pouring, and finishing.
If a contractor hands you a flat $4,500 estimate for a new 15x20 patio, you need to know if that is a fair deal. First, calculate the total square footage:
15 ft (Length) × 20 ft (Width) = 300 Square Feet
Now, calculate the price per square foot:
$4,500 (Total Quote) ÷ 300 (Square Footage) = $15.00 Per Square Foot
A $15.00 price per square foot for a standard concrete pour is generally on the higher side unless it includes decorative stamping, coloring, or complex site prep. By knowing this baseline number, you can negotiate or get a second opinion.
How to Calculate Deck Price Per Square Foot
Building a deck is drastically different from pouring a slab. You are paying for footings, framing, decking boards, and railings. A deck price per square foot calculator must account for the type of material you choose, as wood and composite vary wildly in price.
For example, you want a 12x16 deck (192 square feet).
| Material Type | Estimated Cost / Sq Ft | Pros | Cons |
|---|---|---|---|
| Pressure-Treated Wood | $25 - $40 | Affordable, traditional look | Requires high maintenance |
| Cedar / Redwood | $30 - $50 | Natural rot resistance | More expensive than pine |
| Composite (e.g., Trex) | $45 - $65 | Low maintenance, durable | High upfront cost |
If a contractor quotes you $8,500 for that pressure-treated deck, divide $8,500 by 192 sq ft to get $44.27 per square foot. You instantly know they are charging a premium well above the $35 average.
Total Deck Estimate ÷ Total Deck Square Footage = Installed Deck PPSF
Use Our Tool to Benchmark
Whether you are pouring a driveway, building a massive multi-level deck, or trying to evaluate the cost of a new construction home, the math is always your best defense against overpaying.
Use our price per square foot calculator to quickly benchmark your quotes against local averages.
Crunch the Numbers
Stop guessing and let the math do the work for you. Use our calculator below to get an instant answer.
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