- Thread starter Soapmaker Man
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https://docs.google.com/spreadsheets/d/1tfyAXhFNQGVgncV5QOTaxFJZREzmFfB6wx0HWdf5n_E/edit?usp=sharing

I did find 54 ounces of oil without a water discount almost filled the 5 lb mold. I was a little disappointed because I wanted some to fill a little dragon mold. I used your new calculator and it came up with 61.77 oz. I'll have to try this amount but it won't be until the weekend.

I use metric measurements and everyone seems to agree on something around volume x .7 to calculate the amount of oils needed for a mold. So I tried using that twice now and end up with less soap than needed both times.I am completely ignorant when it comes to ounces and inches, so I did the math to figure out what it would be in cm and grams.

Take the volume in cubic cm (Length x Width x Height).

Divide that by 2,54^3 (which is 2,54 x 2,54 x 2,54) = 16,39 (to get the cubic cm into cubic inches).

And multiply by 28,35 to convert that into ounces.

Then multiply by the 0,4.

So it's:

(L x W x H) / 16,39 x 28,35 x 0,4

Which is the same as :

(L x W x H) x 0,692

That's for the metric users.

Please note: I have not tested this formula so use at your own risk! Althouth the link given by TopCat http://www.smellychicksonline.com/2008/ ... your-mold/ gives 0,657 for metric users... I don't know where it comes from but it is very close to what I found.

I used a tea-box with 2 compartments today with each compartment measuring 8 x 6.5 x 4.5 cm's. So multiplying those measurements by 2 and then by .692 I ended up with 323 grams of oils needed. While these molds are small I still ended up with the soap being over half a centimeter below the line I wanted it to reach.

For the recipe I used the standard water amount used in soapcalc of 38%. I that what makes a difference? Not sure on how to factor the water amount in the calculation.

IrishLass

Has anyone worked this out in metric?

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Post #187 has the weight/volume ratios for water, oils, and solid fats given in both metric and imperial. It's kind of clunky to get there, but with that info, plus the measurements of your mold you should be able to come up with a fairly close answer.Has anyone worked this out in metric?

Also, this is an old thread. Last post before ours were over two years ago (though I'll admit the info in the thread may well be handy to several of us new folks). Necro posting is kind of frowned on, overall. Much better to quote snips from the old thread you're referencing in a new thread.

Sorry I am new and just using the search feature. I am not sure what Necro posting is.Post #187 has the weight/volume ratios for water, oils, and solid fats given in both metric and imperial. It's kind of clunky to get there, but with that info, plus the measurements of your mold you should be able to come up with a fairly close answer.

Also, this is an old thread. Last post before ours were over two years ago (though I'll admit the info in the thread may well be handy to several of us new folks). Necro posting is kind of frowned on, overall. Much better to quote snips from the old thread you're referencing in a new thread.

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Trish,

If you calculate in metric (cm) then multiply volume by 0.70 for the weight of oils that will fit.

If you calculate in inches use 0.37 for the weight of oils.

Some corrections will need to happen because of additives but this get me real close.

I've done that with my silicone molds but this is a homemade wooden mold. It's not going to hold water.

If you are having good luck using that method, could you line your mold with a garbage bag for your water measurement?I've done that with my silicone molds but this is a homemade wooden mold. It's not going to hold water.