How Many
Gallons Of Water Are In My Swimming Pool?
How Much
Water Is In My Pool?
Why Do I
Need To Know This, And How Do I Figure It Out?
In order to figure out the proper
doses of many chemicals for your pool, you often need to determine
approximately how many gallons of water it holds. Also
when adding a Pool Heater, Heat Pump or Solar Heater to
your pool, you will also need to know how many gallons
you are dealing with.
To do that, you need
to use a ruler to measure your pool to find out these
four different numbers; Length, Width, Diameter (for
Round Pools), Average Depth and
then use a Fixed Volume Multiplier to determine the
approximate number of gallons the pool holds.
If you have never
done this before, don't worry. We will walk you through
the detailed steps below.
I Know
What I'm Doing. Just Tell Me The Formulas.
If you don't
need a detailed tutorial, and you already know your
measurements, and how to calculate average depth, here
are the quick formulas for you to use on your own
calculator.
Formula For Average Gallons In
Rectangle, Square Or Freeform Pools:
Length x Width x Average Depth x 7.5 = Total
gallons
Formula For Average Gallons In
Circular Pools:
Diameter x Diameter x Average Depth x 5.9 =
Total gallons
Formula For Average Gallons In Oval
Pools:
Length x Width x Average Depth
x 5.9 = Total gallons
Formula For Average Depth Of Pools With Slopes:
Shallow End Depth + Deep End Depth Divided by 2 =
Average Depth
Well, I Have The Basic
Measurements, So Can You Just Figure It Out For Me?
Absolutely.
You can use the E-Z Pool Water Calculator below to get
the approximate number of gallons in your pool.
Tips:
1- Length And Width are for rectangle, squares or ovals.
It is best to use whole numbers, rounded up. For
example, if the pool is 16 1/2 feet wide, use 17 feet as
the width.
2- Put the Diameter in the Length And Width fields for
Circular pools. It is best to use whole numbers, rounded
up. For example, if the pool is 21 1/2 feet in diameter,
use 22 feet as the diameter.
3- For the Average Depth, it is best to use whole
numbers, rounded up. For example, if the Average Depth
is 5 1/2 feet, use 6 feet as the Average Depth.
3- Use the Gallon Multiplier of 8 for rectangles or
squares for best results.
4- Use the Gallon Multiplier of 6 for Circular or
Ovals for best results.
E-Z Pool Water Calculator For
The Approximate Number Of Gallons Of Water In Your Swimming Pool
One More Time - - - -
Quick Tips To Get A General Idea Using The
Calculator Below:
Average Depth of a "typical"
inground pool is 5
Average Depth of a "typical" above ground pool is 4
Gallon Multiplier for rectangle or square pools is 8
Gallon Multiplier for circular or oval pools is 6
Examples:
For a 16x32 rectangle inground
pool you would use 16 x 32 x 5 x 8 = 20,480 Gallons
For a 24 round above ground pool you would use 24 x
24 x 4 x 6 = 13,824 Gallons
Give It A Try For Yourself !
Length =X
Width =X
Average Depth =X Gallon
Multiplier =
The Approximate
Gallons Of Water In Your Pool Is =
I Know
Nothing. Please Walk Me Through The Whole Process.
If you know
nothing, don't worry!
Most people have never done this before. So we will show
you the easiest and best way to measure your Pool.
Remember, No One
Expects You To Be 100% Exact. Just Do The Best You Can.
Please realize that you are never going
to be 100% accurate due to calculated pool water gallons
(volume) are an approximate value due to the variations
in the sizes, distances and angles of the various pool
shapes and slopes.
Also a pool can be filled "to the top"
and can also only be filled only "X" amount of inches
from the top. For example, a huge rain storm can raise
the water level in a pool by a few inches over night, as
many people have seen all too often. And a few inches
(up or down) will change the "exact" number of gallons
in any pool potentially hundreds or thousands of
gallons, depending on the overall size of the pool.
So don't worry. And don't get too hung
up on being overly exact, just do the best you can with
your measurements.
What Do I
Need To Measure, And How?
You can easily measure the Length, Width
and Diameter (if Round) of any swimming pool with a
typical ruler. Write down those measurement, generally
to the nearest foot will be good enough.
Now You're
Gonna Need To Get The Average Depth of the Pool
If you are lucky enough to have an Above
Ground Pool, or some Inground Pools where the entire
bottom is one Depth, it is very easy to figure out the
Average Depth. It is just the Depth of the water.
Measure it and write down that number.
However, most Inground Pools, and many
newer Above Ground Pools have varying Depths, usually
with angled Slopes going from level to level. This makes
getting an Average Depth a bit more difficult.
How to determine the Average
Depth of a Swimming Pool where the bottom slopes:
Below is a side-shot of the "typical"
inground pool that has a shallow end (see "D"), then a
slope that leads into the deep end (deep end is "C").
If you have a long firm ruler, use that to take your
measurements for the Depths. If you have a ruler, but it
isn't very firm, or long enough, just use your vacuum
pole to mark the depths of the pool with a simple piece
of tape (or magic marker) on the pole. Then just take
your measurements off the vacuum poll with your ruler.
Again, you just really need the gist, don't get too hung
up on an inch or two either way. Usually measurements
like 3', 4', 6, 8', etc. are good enough.
First measure the depth of "D", the shallow end
(usually anywhere from 3' to 5'), and then measure
the depth of "C", the deep end (usually anywhere between 6' and 12').
Then, add them together and divide by 2. This is the Average
Depth of your pool.
For example, if your shallow end "D" is
4', and your deep end "C" is 8', this would be your
formula for the Average Depth:
Formula For Average Depth Of Pools With
Slopes:
Shallow End Depth + Deep End Depth Divided by 2 =
Average Depth
Example:
Shallow End = 4' + Deep End = 8', For A Total Of = 12'
12' divided by 2 = 6'
Therefore, in this example, your Average Depth would
be 6 feet.
So here are the actual formulas to
figure out how much water is in your swimming pool
These formulas hold
true for both Inground pools as well as above ground
pools.
Rectangular, Square or Free
Form Pools:
Formula For Average
Gallons In Rectangle, Square Or Freeform Pools:
Length x Width x Average Depth x 7.5 = Total
gallons
For example: 16' x 32' x 4.5' x
7.5 = 17,280 Gallons
Circular
Pools:
Formula For Average
Gallons In Circular Pools:
Diameter x Diameter x Average Depth x 5.9 =
Total gallons
For example: 18' x 18' x 4' x 5.9 = 7,646 Gallons
Oval
Pools:
Formula For Average
Gallons In Oval Pools:
Length x Width x Average Depth
x 5.9 = Total gallons
For example: 15' x 30' x 4' x 5.9 =
10,620 Gallons
So Now,
Scroll Back Up On This Page To The E-Z Pool Water
Calculator And Give It A Try!
Just take your newly discovered
measurements for Length, Width, (Diameter if Round), and
Average Depth - and plug those numbers into the E-Z Pool
Water Calculator and see how much water is in your pool.
It's that easy!
Blah,
Blah, Blah. I Really Don't Have Time For All Of This.
Can You Just Cut To The Chase?
If you just
don't care that much about knowing the "exact" amount of
water in your pool, you are in luck! We have created some
handy charts
of the most popular sized Pools, and their Average
Gallons of water. These charts are generally accurate
enough for most residential uses.
Most
Common Sizes Of Inground Rectangular Pools And How Many
Average Gallons They Contain
POOL SIZE
4' AVG. DEPTH
5' AVG. DEPTH
6' AVG. DEPTH
12' X 24'
8,640
10,800
12,960
14' X 28'
11,760
14,700
17,640
15' X 30'
13,500
19,900
20,250
16' X 32'
15,400
19,200
23,040
18' X 36'
19,400
24,300
29,160
20' X 40'
24,000
30,000
36,000
25' X 45'
33,750
42,187
50,625
25' X 50'
37,500
46,900
56,250
30' X 50'
45,000
56,250
67,500
Most
Common Sizes Of Above Ground Pools And How Many Average
Gallons They Contain
Above Ground Pools with a
Depth of 48" (4')
SIZE
GALLONS OF WATER
12' Round
3,398
15' Round
5,310
18' Round
7,646
21' Round
10,407
24' Round
13,593
27' Round
17,204
28' Round
18,502
30' Round
21,240
33' Round
25,700
15' x 30' Oval
10,620
Above Ground Pools with a
Depth of
52" (4.5')
SIZE
GALLONS OF WATER
12' Round
3,823
15' Round
5,973
18' Round
8,602
21' Round
11,708
24' Round
15,292
27' Round
19,354
28' Round
20,815
30' Round
23,895
33' Round
28,912
15' x 30' Oval
11,947
Need More Help?
Can't find what you need? Feel free to give us a call.
PoolAndSpa.com's Customer Service Hotline
is
1-800-876-7647 or 1-702-437-4343.