ESTIMATING TOTAL GALLONS IN A POOL OR SPA ENGINEERING DATA
Length
Average Depth 3.5 ft.
Width
24 ft. Dia.
Depth (deep)
Depth (shallow)
Radius 2 x 3.14 x A.D. x 7.5 = Gallons 12 x 12 x 3.14 x 3.5 x 7.5 = 11,869 Gals. Dia. x Dia. x Av Dp x 5.9 = Gallons 24 x 24 x 3.5 x 5.9 = 11,894 Gals.
Formula A: Length X Width X Average Depth X Gal.cu.ft. = Gallons
Example: Pool Length
= 40 ft.
Pool Width = 20 ft. Shallow Depth = 3 ft. Deep Depth = +8 ft.
Gal.cu.ft. Rectangle: Oval: Kidney:
Total Depth
= 11 ft.
7.5 6.7 7.0
Using formula A: 40 X 20 = 800 sq. ft., 800 X 5.5 = 4,400 cubic ft., 4,400 X 7.5 = 33,000 gallons
530
The area in square feet for pools and spas can be determined by using one or more of the above formulas.
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