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Thread: ok, how many gallons is it!

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    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    East Texas

    ok, how many gallons is it!

    According to pool calculator, when I punch in my 16x32 x4 OVAL pool, it calculates 13,700 gallons. Is this a booboo?

    According to the printout I got from the pool store where I purchased, on their chemical test printout, it list 12, 083 gallons.

    A chart I found on waterwarehouse lists calculations as length x width x depth x 5.9 = gallons capacity which works out to the T @ 12,083

    Which is correct? This may be how I initially got my TA too high by using the 13,700 figure. I have attached the chart if it helps anyone.

    Attached Images Attached Images
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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    Re: ok, how many gallons is it!

    In your case I would use the lower of the 2 for a couple of weeks and see if your numbers are closer to reality. We all have to make minor adjustments using the pool calculator. This is due to variables like true water depth at the time of the sample, and imperfections in the pool itself.
    20k gal. IG fiberglass/plaster rectangle 32'x16'
    Hayward Superpump 3/4 H.P. primary Hayward model 5060 Booster Pump
    Hayward Pro Series High Rate Sand Filter
    Pentair Model 320 automatic Chlorine/bromine in-line feeder

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    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: ok, how many gallons is it!

    You're gonna have to figure it out by trial and error. Strictly by measurement and calculation, you'd have to deduct for things like stairs and radiused corners, and add for what's in the lines and filter. If you overshoot, go lower by a thousand gallons. If you undershoot after that, add 500. Next time, half the difference again. Luckily, our target numbers are a range, not accurate to 3 decimal places.

    I'd figure low for things like pH adjustments and high for chlorine until I got it right.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: ok, how many gallons is it!

    Neither chart is accurate to the gallon They are all ways to get close, but not be 100% accurate, as no two pools are exactly the same (unless you have a Fibreglas pool that came from a mold!). Like Richard said, get close and then work your way to a bit more accurate as you go. In this case, like horseshoes and hand grenades, close is (somewhat!) good enough!

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