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The easy answer is that water weighs in at 0.5541 ounces per cubic inch and the amount of oil in a cubic inch of raw soap batter weighs in at about 70 to 74 percent of that. Multiply .5541 by .7 or .75 and see what the result is. 0.39 or0.40 ( or 0.37) gets you close enough to estimating how much oil to use in a given mould.The formula I use does not tell me how much batter I can put in the mould only how much oil. No matter which number I use I usually would need to make small adjustments to completely fill but no over flow the next time. Don't ask. I keep an oval bar set at the ready.
The easy answer is that water weighs in at 0.5541 ounces per cubic inch and the amount of oil in a cubic inch of raw soap batter weighs in at about 70 to 74 percent of that. Multiply .5541 by .7 or .75 and see what the result is. 0.39 or0.40 ( or 0.37) gets you close enough to estimating how much oil to use in a given mould.
The formula I use does not tell me how much batter I can put in the mould only how much oil. No matter which number I use I usually would need to make small adjustments to completely fill but no over flow the next time. Don't ask. I keep an oval bar set at the ready.
