Many times you run across recipes that are written in percentages. These are great because you can convert them into workable recipes for any size of mold or production.

Sometimes the process of converting percentages to the recipe size that you need can be confusing. Let’s walk through it.–P5199.aspx?afid=5
I’ve got this nifty silicone mold from Bramble Berry. After checking out the website I see that it holds 50 oz of soap and measures 10″ x 3 5/8″ x 2.25″. Before I convert my recipe from percentages to ounces…I need to know the amount of oil that it holds.

50 oz of soap means it holds 50 oz of finished soap (water + lye+ oils). I need to know how much oil it will hold so I can convert my percentages to ounces of oils.

I use the formula l (length) x w (width) x h (height) x .4 to determine how many ounces of oil my recipe needs to be.

So for the BB loaf mold:
10 x 3.625 x 2.25 x .4 = 32.625 oz

I like to do fluffy tops so I will add about 4 extra ounces so I have enough soap on top.

My recipe needs to contain 37 oz of oils.

My recipe in percentages looks like this:

Olive oil – 50%
Coconut oil – 32%
Shea butter – 8%
Avocado oil – 8%
Castor oil – 2%

To convert the above percentages you will multiply each ingredient’s percentage by 37 oz which is your total oils needed (or the 100%).

Olive oil – 37 x .5 = 18.5 oz
Coconut oil – 37 x .32 = 11.84 oz
Shea butter – 37 x .08 = 2.96 oz
Avocado oil – 37 x .08 = 2.96 oz
Castor oil – 37 x .02 = .75 oz

So your oils needed will be:

Olive oil – 18.5 oz
Coconut oil – 11.84 oz
Shea butter – 2.96 oz
Avocado oil – 2.96 oz
Castor oil – .75 oz

Run this through a lye calc to get the lye amount needed.

Lye – 5.28 oz (5% SF)

I double my lye amount to get my water amount. (Ignore the water amount the lye calc gives you.)

Water – 10.56 oz

So my final recipe is:

Olive oil – 18.5 oz
Coconut oil – 11.84 oz
Shea butter – 2.96 oz
Avocado oil – 2.96 oz
Castor oil – .75 oz
Lye – 5.28 oz

Water – 10.56 oz

This recipe will make a total of 52.85 oz of soap.

BB’s site states that the mold will hold 50 oz…so we’re good! I always prefer to have a bit extra than not enough.

If you want extra to make higher peaked soap…then calculate for extra soap.

Happy Soaping!