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Welcome!
Thank you for visiting. DiluteOil.com strives to increase both understanding and accuracy in the calculations of blending essential oils, or as they are sometimes called Recipes.

Our core feature is the The Essential Oil Dilution Calculator, located on the home page. We also have a second calculator, The MasterBlend Calculator, for use in calculating both the MasterBlend and the final dilution when used. There is also a page with detailed information on how the calculations are made, to what standard and whether it is important to have accurate calculations for your EO blends. 

We recommend starting with the "recipe" calculator on the home page. But, once comfortable with that, you should try out the MasterBlend calculator - handy for creating "bulk" blend bottles of your favorite blends. 

Again, thank you for stopping by. We hope this information is helpful to your Essential Oil journey
Table of Equivalents
The following is a brief outline of the table of equivalents used on DiluteOil.com.

1.00000 
 ounce
6.00000 
 teaspoon
2.00000 
 tablespoon
0.12500 
 cup
29.57353 
 milliliter
591.47060 
 drops ("20")

For a full discussion on this Table of Equivalents; their source; and details on what Drops ("20") are please see our explanation here.
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DiluteOil.com

Calculating Individual Oil Ratios in MasterBlends

The 3 Steps to Calculating the Individual Oil Ratios from a MasterBlend to a Diluted Blend for Application.

1. Sum all the parts of the MasterBlend
2. Divide an individual oils parts by the Sum to get the individual oils ratio (repeat for each oil)
3. Multiply these individual oil ratios by the target Diluted Blend ratio desired (repeat for each oil)

 

This post intends to provide an understanding of how to hand calculate Essential Oil MasterBlend ratios. These then can be used to determine if they meet the safety guidelines you, the user, have chosen.  The calculations can be used, as is; or used as a foundation of understanding when using an on-line tool, such as DiluteOil.com’s comprehensive MasterBlend Calculator. These hand calculations will walk you through the steps to determine the ratios of oils from a MasterBlend through to actual usage when added to carrier oils.

First, what is a MasterBlend?  Simply put, it is a pre-mixed blend of essential oils, which are stored as a MasterBlend, awaiting further dilution with a carrier oil, as needed. This allows for larger, complex blends to be created, that are then used sparingly to create the final dilution for application.  The example used in this post will create a MasterBlend that is 55 drops of essential oil.  But, the recommended usage is only 4 drops in a 10mL roller ball.  The remaining 51 drops would be saved undiluted, until the next rollerball is needed to be blended.

Why worry about these calculations?  There are a wide variety of sources for essential oil safety information. DiluteOil.com does NOT provide specific safety guidelines; but we DO provide accurate calculations that you can use compare the safety source(s) you choose.  There are a wide variety of sources for suggested essential oil uses and blends/recipes of mixtures.  But, when it comes to comparing the suggested blends with the suggested safety guidelines, there is often no direct information and it is up to YOU to calculate the safety ratios – especially for the individual components of a MasterBlend.

To clarify, the term “MasterBlend” used here refers to the total combined essential oil blend/recipe, without any carrier oil.  The term “Diluted Blend”, refers to the blending of a portion of theMasterBlend with a carrier oil, to create the application oil for use.

With this as introduction, the process of calculations, is simple (but very repetitive).

There are only 3 steps.

  1. Sum all the parts of the MasterBlend
  2. Divide an individual oils parts by the Sum to get the individual oils ratio (repeat for each oil)
  3. Multiply these individual oil ratios by the target Diluted Blend ratio desired (repeat for each oil)

Let’s walk through an example, using a MasterBlend formula, suggested by our friends at Safe Use of Edens Garden Essential Oils (SUEGEO)

  1. Sum all the parts of the MasterBlend

  1. Divide an individual oils parts by the Sum to get the individual oils ratio

  1. Multiply these individual oil ratios by the target Diluted Blend ratio desired (in our example above, we are going for a 2% 10mL Rollerball)

Now that you have the dilution ratio of the individual oils you can compare the fully Diluted Blend’s individual oils to the safety profiles that you have researched and chosen to use.

In our example, the highest dilution ratio is listed as 0.55%.  That is a very small percentage; but there are essential oils that have safety guidelines as low as 0.05% – that is 1 part in 2,000.  Putting that in perspective, that is:

1 drop in 100mL, or
1 drop in 3.38 oz, or
1 drop in 20 teaspoons!

Now that you know how MasterBlends and their individual oils are calculated in Diluted Blends, you can calculate these ratios yourself and understand the math that goes on behind our MasterBlend Calculator.

For information on safety ratios for essential oils, we recommend becoming a member of a reliable Facebook group and acquire reliable research based safety information such as Essential Oil Safety, 2nd Edition by Robert Tisserand and Rodney Young.

https://www.facebook.com/groups/SafeUseEdensGardenEssentialOils/

https://www.facebook.com/groups/EssentialOilConsumerSafety/

http://tisserandinstitute.org/safety/safety-guidelines/

Happy Blending!