# I need a refresher on bleach calculations

#### Titanium

This is lame, but I need a refresher on how to calculate and normalize the prices for different bleach concentrations and volumes. I did a board search, but I did not have any luck.

For example, I can get 1 gal of 10% liquid chlorine at Orchard Supply for \$3.25.
And I can get 1.42 gal of 6% liquid chlorine at Target for \$2.29

Can you show how you do the calculations for me?

Thanks!

Titanium

#### JohnT

TFP Expert
What I do is figure out how much NaOCl there is in each jug. The Orchard Supply chlorine contains 12.8oz(10% of 128oz) NaOCl for \$3.25, so it's 25.4 cents per ounce of NaOCl. Target bleach contains 10.9oz (6% of 1.42gal) NaOCl for \$2.29, so it's 21 cents per ounce of NaOCl.

#### HarryH3

##### Well-known member
I've yet to find anything that beats the 96 ounce Great Value jugs of 6% at Walmart. 99 cents per bottle.
6% of 96 = 5.76 ounces of NaOCl @ 17.19 cents per ounce.

They sell a much larger bottle for \$2.28, but it contains less than the amount in 2 of the smaller bottles (for a total of \$1.98 ) so it's cheaper per ounce in the smaller bottles.

#### JohnT

TFP Expert
HarryH3 said:
I've yet to find anything that beats the 96 ounce Great Value jugs of 6% at Walmart. 99 cents per bottle.
6% of 96 = 5.76 ounces of NaOCl @ 17.19 cents per ounce.

They sell a much larger bottle for \$2.28, but it contains less than the amount in 2 of the smaller bottles (for a total of \$1.98 ) so it's cheaper per ounce in the smaller bottles.
I've never seen the small bottles for 99cents. They are a decent amount more expensive than the big ones (per ounce) at every store I've been in. \$1.28 is the normal price here.

#### HarryH3

##### Well-known member
The Walmart here has a lot of products that cost less per ounce in the smaller size. It doesn't make sense, but most people probably just grab the larger package, assuming that it's the better deal.

I like using the smaller jugs anyway, as my pool takes right at 3 quarts per day, so I don't have to measure. I just pour the whole jug in.

#### Titanium

Thanks for the help.

I'll start having my wife pick up some generic Target bleach when she is there. I swear she goes to Target at least 3 times per week anyway.

Titanium

#### sammm

I've compared the prices on the shelfs at Walmart between the 2 size bottles. I think they show cost per ounce and I think they are the same price per oz.

#### HarryH3

##### Well-known member
The tags on bleach at my Walmart don't list the price per ounce, but 99 cents for 96 ounces is a better deal than 176 ounces for \$2.28...