Pool Area Calculator
Find rectangular or circular pool surface area using the matching shape. For other outlines, split the pool into simple shapes and add the areas.
Free area calculator
Pool Area Calculator
Pool Area Calculator: Calculate surface area for a rectangular or circular pool. For other outlines, divide into simple shapes and
Known Area
Room Dimensions
Multiple Rooms
Room (Feet + Inches)
ft
in
ft
in
Rectangle (Feet + Inches)
ft
in
ft
in
Wall & Window Dimensions
Cathedral Wall Dimensions
Square Dimensions
Rectangle Dimensions
Rectangle Border
Circle Dimensions
Circle Border (Annulus)
Annulus Dimensions
Triangle (3 Sides)
Triangle (Base & Height)
Trapezoid
Regular Polygon
Area + Depth (Volume)
Material Waste FactorOPTIONAL
%
Estimate Material CostOPTIONAL
Calculation Results
More square footage calculators
Pick a calculator for rooms, shapes, materials, outdoor areas, or unit conversions.
Room Calculator → House Calculator → Bedroom Calculator → Bathroom Calculator → Kitchen Calculator → Multiple Rooms → Rectangle Calculator → Triangle Calculator → Circle Calculator → Trapezoid Calculator → Regular Polygon Calculator → Irregular Shape → Odd Shape → Uneven Sides → Flooring Calculator → Tile Calculator → Paint Calculator → Concrete Calculator → Insulation Calculator → Lawn Calculator → Yard Calculator → Landscaping Calculator → Pool Calculator → Garage Calculator → Roof Calculator → Wall Calculator → Feet & Inches → Inches Calculator → Height Width Length → Sq Ft to Acres → Cubic Yards Calculator →
How It Works
1
Select Shape
Choose the shape that matches your space.
2
Enter Dimensions
Enter measurements in any unit. Add quantity, waste factor, and material price if you need them.
3
Get Results
See area in ft², in², yd², m², and acres, plus a cost estimate when you enter a price.
Frequently Asked Questions
How do I calculate the square footage of a pool?
Rectangular pools: length × width. Round pools: use Circle with radius or diameter. Oval or kidney shapes: use the closest simple shape or split into sections.
How do I calculate pool deck area?
Find total deck-plus-pool area, then subtract the pool surface. That gives deck-only square footage for materials. For a round pool, try Circle Border or Annulus.
How do I figure out the surface area of a round pool?
Measure diameter and enter it in Circle. A 27-foot pool has diameter 27 ft, radius 13.5 ft, and surface area π × 13.5² ≈ 572 sq ft.
How much pool liner material do I need?
Above-ground: floor area plus wall area (circumference × wall height). A 24-ft round pool with 4-ft walls: floor 452 sq ft, walls 75.4 × 4 = 302 sq ft, total 754 sq ft. Add 10% for overlap.
How do I calculate the area around a pool for fencing?
Fencing is measured in linear feet, not square feet. Measure the perimeter of the fenced area. For patio planning inside the fence, subtract pool area from total enclosed area.