How many gallons is my hot tub.

Mjwall82

Active member
Jan 29, 2020
31
Long island ny
I'm in the beginning stages of a pool build and the process has led me to finding this web site. Having read obsessively to learn about the pool I've learned that I have been taking very poor care of the stand alone hot tub that came with the house we moved into in August. I've ordered some AHH-Some and a TF-100 test kit, downloaded the pool math app and I am ready to get this thing sorted out. But, I don't have any idea how many gallons my Hot tub holds. Can somebody please point me in the right direction to figure out how many gallons this hot tub holds? Thanks so much in advance.
 

YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
12,432
Evans, Georgia
Take a look at the bottom of the Old Version of PoolMath (at bottom of this page) and enter in the details in "Calculating Pool Volume" and it will help you right out!

Maddie :flower:
 

YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
12,432
Evans, Georgia
ok, skip that although you can get a ball park and then deduct x amount for each seat.

What brand and model do you have? You should be able to find that information within the mechanical panel I would imagine?

Maddie :flower:
 

Mjwall82

Active member
Jan 29, 2020
31
Long island ny
ok, skip that although you can get a ball park and then deduct x amount for each seat.

What brand and model do you have? You should be able to find that information within the mechanical panel I would imagine?

Maddie :flower:
The pool math formula gave me 611 gallons. So maybe 500 is a good guesstimate. I'll see if I can figure out the make and model when I get home from work. Thanks for the help.
 

jseyfert3

Bronze Supporter
Oct 20, 2017
595
South-Central WI
Not sure what the brand/model is. I'm going to take a look this afternoon. It seats 6. So, maybe around 400-500 gallons.
Likely. For an Ahh-some purge I'd use 450 gallons for figuring out how much to add. Once you do your purge(s) and drain and clean the tub, write down your water meter value. Then refill your tub, taking care to not run other water in your house. When your tub is filled to the manufacture recommended level (halfway up the skimmer for ours), shut off the water then go note your water meter value again. Subtract the original value from the later value to get water volume in cubic feet. Multiply this value by 7.48 to get gallons of water.

Now you have an exact amount of water to use for chemical additions going forward.