Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 10 of 10

Thread: Size of my pool calculation

  1. Back To Top    #1

    Join Date
    Feb 2011
    Location
    Roseville, CA
    Posts
    24

    Size of my pool calculation

    Various calculators estimate my pool size to be between 18,000 to 22,000 gallons. However, when I pour in 1 jug of GV 6% bleach (182 oz) I get 5.5 ppm increase in ch. That puts my pool size at around 16,000 gal.

    What do you think?
    22000G Oblong shape IG pool
    Hayward Cartridge Filter
    Gray Plaster
    Emerson Threaded Energy Efficient Full-Rate 1.5HP
    Booster pump: Polaris PB4-60

  2. Back To Top    #2

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: Size of my pool calculation

    Sounds like you have a 16,000 gallon pool.

    My calculation for mine came to 47,000 gallons, but like you I found it wasn't accurate. I use 44,000 gallons because when I add chemicals, it works out correctly.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

  3. Back To Top    #3

    Join Date
    Apr 2011
    Location
    Fresno, California
    Posts
    46

    Re: Size of my pool calculation

    Most calculations do not consider steps and/or other feature that might reduce the gallons. You may be correct around 16000 - 18000 gallons
    23k IG. Plaster. StaRite system 3 Cartridge Filter (S7M120), Pentair MiniMaxNT Heater. IntelliFlo VS (8 Speed). Going BBB

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Size of my pool calculation

    You can't count on bleach being exactly 6%. If it came from the factory recently it might be higher, and if it has been sitting around for a while it might be lower, anywhere from 3% to 8% in extreme cases. To adjust your pool size estimate you need to watch several different chemical additions over a period of time. If they are all consistently coming out higher than expected then the pool is smaller than you think.

    Estimating the pool size is tricky. Fortunately you only need to be within 10 or 20 percent, as that is good enough. For now I would go with 18,000 gallons, and then adjust that over time if you are seeing a consistent pattern.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  5. Back To Top    #5
    Voodoo_Pool's Avatar
    Join Date
    May 2011
    Location
    On the border AR/TN
    Posts
    82

    Re: Size of my pool calculation

    It is easy to calculate the size of a square (rectangle). Just get in the water and measure various 'blocks' and then add those 'blocks' together. We are all about taking charge of our pool. Why are you relying on someone else to 'estimate' the size of YOUR pool. Get wet!
    22,000 gallons "L" shaped with spillway spa; Hayward 4820 DE; IG Vinyl; 2000 ppm salt; 50 ppm Borates; liquid chlorine; Polaris w/ booster; TF-100 Test Kit w/SpeedStir

  6. Back To Top    #6
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: Size of my pool calculation

    chemical sizing is fairly accurate if verified over several additions of several different chems.

    Pool Calculators are not very accurate because they don't have enough parameters entered (slopes, curves, radius', steps, etc.) and because most people tend to put the depth of the pool in and not the actual water depth.

    Pool Stores like to exaggerate the size of your pool because their software figures doses (and therefore chem sales) based on the entered size. I have one PS that says my pool holds almost 16,000 gallons and it doesn't even hold quite 13,000 gallons.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  7. Back To Top    #7

    Join Date
    Feb 2011
    Location
    Roseville, CA
    Posts
    24

    Re: Size of my pool calculation

    Quote Originally Posted by Voodoo_Pool
    It is easy to calculate the size of a square (rectangle). Just get in the water and measure various 'blocks' and then add those 'blocks' together. We are all about taking charge of our pool. Why are you relying on someone else to 'estimate' the size of YOUR pool. Get wet!


    I wish my pool was rectangular, then I can easily put a cover. Also, calculating 'blocks' would be easier.
    22000G Oblong shape IG pool
    Hayward Cartridge Filter
    Gray Plaster
    Emerson Threaded Energy Efficient Full-Rate 1.5HP
    Booster pump: Polaris PB4-60

  8. Back To Top    #8
    Voodoo_Pool's Avatar
    Join Date
    May 2011
    Location
    On the border AR/TN
    Posts
    82

    Re: Size of my pool calculation

    YES! Make your pool a bunch of 'blocks' and add them together. This is 'simple' high school calculus.
    22,000 gallons "L" shaped with spillway spa; Hayward 4820 DE; IG Vinyl; 2000 ppm salt; 50 ppm Borates; liquid chlorine; Polaris w/ booster; TF-100 Test Kit w/SpeedStir

  9. Back To Top    #9

    Join Date
    Dec 2009
    Location
    Central Massachusetts
    Posts
    2,690

    Re: Size of my pool calculation

    Quote Originally Posted by Voodoo_Pool
    This is 'simple' high school calculus.
    Not everyone knows how to do intregal calculus

    Coming within a couple thousand gallons on an estimate will get one close.
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

  10. Back To Top    #10
    Voodoo_Pool's Avatar
    Join Date
    May 2011
    Location
    On the border AR/TN
    Posts
    82

    Re: Size of my pool calculation

    Quote Originally Posted by bk406
    Quote Originally Posted by Voodoo_Pool
    This is 'simple' high school calculus.
    Not everyone knows how to do intregal calculus

    Coming within a couple thousand gallons on an estimate will get one close.
    Oh, so it is like nuclear weapons. Close enough. Or government work.
    22,000 gallons "L" shaped with spillway spa; Hayward 4820 DE; IG Vinyl; 2000 ppm salt; 50 ppm Borates; liquid chlorine; Polaris w/ booster; TF-100 Test Kit w/SpeedStir

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •