How to Calculate Pool Deck Square Footage
The calculation has three steps: find the total area inside the deck boundary, calculate the pool’s surface area, then subtract the pool area.
1. Calculate the Total Area
For a rectangular deck boundary:
Total Deck Area=Total Length×Total Width
For a circular deck boundary:
Total Deck Area=π×(2Total Diameter)2
2. Calculate the Pool Area
For a rectangular pool:
Pool Area=Pool Length×Pool Width
For a circular pool:
Pool Area=π×(2Pool Diameter)2
3. Calculate the Deck Area
Pool Deck Area=Total Deck Area−Pool Area
Use matching units for all measurements. The total area and pool area should also have the same shape basis for this subtraction to provide a useful estimate.
Example
Suppose a rectangular pool is 30 ft long and 15 ft wide, and the rectangular area inside the deck boundary is 40 ft by 25 ft.
Total Deck Area=40×25=1,000 sq ft
Pool Area=30×15=450 sq ft
Pool Deck Area=1,000−450=550 sq ft
The estimated pool deck area is 550 sq ft.
Frequently Asked Questions
How much space should I leave around a pool for a deck?
The space depends on how you plan to use the deck, available room, and local requirements. Allow enough space for safe walking, access, and any furniture or equipment you plan to place there.
Can I use this calculator for an irregular-shaped pool or deck?
The basic formulas are for rectangular and circular shapes. For an irregular layout, divide the area into simpler shapes, calculate each area, and combine the results. For a more precise estimate, account for the pool’s shape and position within the deck boundary.
Which materials can I plan for with the calculated area?
You can use the result to estimate surface materials such as concrete, pavers, or decking. Add an appropriate allowance for cuts, breakage, or installation waste based on the material and layout.
How do I estimate the cost of a pool deck?
Multiply the estimated deck area by the material or installation cost per square foot:
Estimated Cost=Pool Deck Area×Cost per Square Foot
This gives a basic estimate; preparation, drainage, edging, labor, and other project costs may be additional.
Check out 17 Similar Calculators: