We have a really cool essential oil section in the Soap Making Resource warehouse where I can work on new natural aroma combinations to my heart’s content. At Soap Making Resource, we carry more than 45 therapeutic grade essential oils as part of our soap making supplies inventory, so there are a ton of great scents that I can play with!
Here’s a picture of me in the warehouse working on an essential oil blend:
So, have you ever seen essential oil blend recipes that look something like this:
3 parts X essential oil
7 parts Y essential oil
2 parts Z essential oil
I’m finding out that many soap makers just don’t know how to transfer information like the above into usable essential oil proportions.
Luckily, I love math… and I love teaching! So let me give you a brief explanation on how the above blend works:
Let’s say your blend is 3 parts bergamot essential oil, 7 parts grapefruit essential oil and 2 parts peppermint essential oil. Now for your soap batch, let’s say you want to create 3 ounces of essential oils total. By the way, I usually use 3 ounces for a 6 pound batch. How do you know how much of each essential oil to include in your blend if you want to use the above recipe?
Well… the above “parts” tells you exactly that!
Let’s look carefully at the recipe. You can see above that the entire recipe is made up of 12 parts. 3 parts plus 7 parts plus 2 parts equals 12… right?
So now, all you have to do is find out what percentage the different essential oils make up. 3 parts bergamot essential oil would be 25%. Why? Because 3 parts divided by 12 parts equals .25 or 25%. So now we know that 25% of the 3 ounces is going to be made up of bergamot essential oil. 25% of 3 ounces is .75 ounces.
Using the same formula, we can see that 7 parts grapefruit essential oil would make up 58.3% of the blend. We know this because 7 parts divided by the total 12 parts equals .583 or 58.3%. 58.3% of 3 ounces equals 1.75 ounces.
Finally, we have 2 parts peppermint essential oil. 2 parts peppermint essential oil means that peppermint will take up 16.66% of the blend. 16.66% of 3 ounces equals .5 ounces.
If you add up the amounts for all three essential oils, you will see that .75 ounces plus 1.75 ounces plus .5 ounces equals your total 3 ounces of essential oils. It’s very easy when you think about it!
I will tell you that when using ounces to measure your essential oils, you will be almost forced to round your numbers. Unless you have an AMAZING scale, you probably won’t be able to accurately measure 1.749 ounces of an essential oil. You will have to round to 1.75 ounces. If you want to be more accurate, measure in grams as I do! The process is exactly the same, just use grams instead of ounces.
Now… If you want to experiment with different essential oil blends, just take a pipette and drop your essential oils of choice onto a piece of paper towel. Put the paper towel in a jar and close the lid. Let it set for a few days to give the aroma time to mellow out. Each drop of essential oil represents 1 part.
Once you come up with a scent that you like, simply use my method above to create a batch of it that’s large enough to use in your soaps. Whether you need 3 ounces 6 ounces or 25 pounds of a blend, you can use my method to figure out how much of each essential oil to use.
Have fun exploring all the wonderful natural aromas that are out there!