Use and Care Manual

Measuring Spa Capacity Measuring Spa Capacity
Dosage rates are determined by the number of gallons
of water your spa holds. Therefore, it is important to
know your spa’s capacity before you add any products
to your spa water. If you don’t know the capacity of
your spa, simply use the formulas below to calculate
the approximate capacity.
1
Calculate average depth in feet*.
2
Calculate in gallons.
For a Rectangular or
Square Spa
For an Octagonal or Oval Spa
For a Circular Spa
Measuring Spa CapacityMeasuring Spa Capacity
Deep end Shallow end Average
depth (ft) depth (ft)
(ft)/2
depth (ft)
+
=
=
Length Width Average Spa Capacity
(ft) (ft) depth (ft)
7.5
(gal)
X
X
X
=
Diameter Diameter Average Spa Capacity
(ft) (ft) depth (ft)
5.9
(gal)
X
X
X
=
Short Long Average Spa Capacity
Diameter Diameter depth
5.9
(gal)
(ft) (ft) (ft)
X
X
X
=
*For the average depth and/or spa capacity, you can also refer to your
spa owner’s manual.
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