How to Calculate Concentration Dilutions

June 9, 2019


The RSO sold by Discovery Garden is intended for inhalation.  If, however you decide to consume it orally and would like to dilute the RSO for easier or more accurate dosing the following calculations may be helpful. 


RSO mixes best with a fat such as olive oil or melted coconut oil


RSO does not blend well with alcohol, even 200 proof, unless the RSO is heated but a high proof alcohol tincture will not be comfortable to consume orally.


Here’s a useful formula for diluting a known solution to a desired strength.


V1 X C1 = V2 X C2

V= volume

C= concentration


The strength of your RSO is known, just look at the label or lab results for cannabinoid content.  Let’s say the label for your 1g syringe reports CBD content = 480mg/g.  How much oil do you need to dilute the RSO to create a solution with 20mg/g?


V1 X C1 = V2 X C2


1g  x  480 mg/g  =  V2  x  20 mg/g


         1g  x 480 mg/g  =  V2

20 mg/g


24 g  =  V2


So your original 1 gram of RSO needs to be diluted to a final volume of 24 grams and you will need to mix 1g of RSO with 23g of oil.  The CBD strength of the resulting solution will be 20mg/g.


This calculation can be done with any of the cannabinoids listed on the back of the package.


If you are trying to figure out how many drops to take after diluting consider that most droppers dispense 0.05 mL per drop, meaning there are 20 drops in 1 milliliter.

1mL of water = 1g of water but from my experience RSO combined with vegetable oil in this manner is about half as heavy as water so there are about 40 drops per gram.   If you want to be precise you can use your scale to calculate how many drops your dropper takes to dispense 1g.


Here’s what you will need:

- a kitchen scale that measures grams and ounces, preferably with accuracy to 0.1g, which      can be found on Amazon or any store that carries kitchen supplies

- a tincture bottle and dropper (if using liquid oil)

- a tiny funnel for pouring the oil into the tincture bottle (if using liquid oil)


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