# Newbie Question about mold size

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#### fillycate

##### Well-Known Member
Hey, y'all. So much to learn and figure out. I have a question about matching mold size to recipe. If, for example, a mold says it is a 3lb mold, does that refer to the weight of the entire soap batch or just the fats? The reason I ask is that the SoapCalc website speaks of the weight of the fats in the recipe. It made me wonder if that is the weight used when deciding what is appropriate for a mold.

#### dibbles

##### Supporting Member
Supporting Member
To figure out the volume of your mold, multiply length x width x height, then multiply that number by .4. This will give you the amount of oils to use for your batch.

Thank you!

#### fillycate

##### Well-Known Member
So... 10 1/4 in x 2 3/4 in x 3 3/8 in x .4 = 38.3? What are the units of 38.3?

#### Jersey Girl

Supporting Member
So... 10 1/4 in x 2 3/4 in x 3 3/8 in x .4 = 38.3? What are the units of 38.3?
You would need 38 oz of oils in the recipe.

#### dibbles

##### Supporting Member
Supporting Member
Sorry I didn’t give you that piece of information. It’s kind of important As Jersey Girl said, ounces.

Ok, got it.