E

N

G

I

N

E

E

R

I

N

G

D

A

T

A

608

ENGINEERING DATA

ESTIMATING TOTAL GALLONS IN A POOL OR SPA

Average Depth

3.5 ft.

24 ft. Dia.

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.

Width

Formula A:

Example:

Depth (deep)

Length

Depth (shallow)

Length X Width X Average Depth X Gal.cu.ft. = Gallons

Pool Length

Pool Width

Shallow Depth

Deep Depth

Total Depth

= 40 ft.

= 20 ft.

= 3 ft.

= +8 ft.

= 11 ft.

Gal.cu.ft.

Rectangle: 7.5

Oval:

6.7

Kidney:

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

The area in square feet for pools and spas can be determined by using one or more of the above formulas.