CBD Oil Dose and Drop Calculator
Turn the milligrams your doctor prescribed into the number of drops from your bottle. This tool does not recommend a dose.
For 25 mg
5 drops
Each drop contains about 5 mg of CBD.
If you measure with a syringe: 0.25 ml
Your doctor decides the dose.
This tool only shows how many drops that is. The amount on the label isn’t always accurate.
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Can you take CBD with your medication?Doses used in studies, by conditionWhat's on this page?
How to calculate it by hand
- Divide the mg in the bottle by the bottle’s ml. That is the CBD in 1 ml.
- Divide that by 20. That is the CBD in 1 drop (1 ml is about 20 drops).
- Divide the mg your doctor prescribed by the CBD in 1 drop. The result is the number of drops.
Example table: 10 ml bottle
| CBD in the bottle | Per 1 ml | Per drop | Drops for 25 mg |
|---|---|---|---|
| 300 mg | 30 mg | 1.5 mg | 16.7 drops |
| 500 mg | 50 mg | 2.5 mg | 10 drops |
| 1000 mg | 100 mg | 5 mg | 5 drops |
| 2000 mg | 200 mg | 10 mg | 2.5 drops |
| 3000 mg | 300 mg | 15 mg | 1.7 drops |
The amount on the label isn’t always accurate: in one study, only 31% of products sold online matched their label.
Frequently asked questions
How many mg are in 1 drop of CBD oil?
It depends on the bottle. Example: if a 10 ml bottle contains 1000 mg of CBD, each drop contains about 5 mg of CBD. Use the calculator above for your own bottle.
How many drops of CBD oil should I use?
Your doctor decides this. The dose varies with the condition, the person and the other medicines you take. Your doctor prescribes the dose in mg; this page shows how many drops that dose is from your bottle.
How do I calculate a CBD oil dose?
Three pieces of information are enough: how many mg of CBD are in the bottle, how many ml the bottle holds, and the mg your doctor prescribed. The calculator uses these to work out how many drops that is.
What should I do if the bottle shows a percentage (%)?
If it says 10%, there are about 100 mg of CBD in 1 ml. Enter this number in the "percentage" section of the calculator. The amount on the label may not always be accurate; in one study, only 31% of products sold online matched their label.
Why is a syringe recommended instead of drops?
Drop size varies from bottle to bottle. A syringe marked in ml measures the same amount every time. The approved CBD medicine is also given with a graduated syringe.
Should CBD oil be taken on an empty stomach or with food?
When it is taken with food, especially a fatty meal, the body absorbs much more CBD. Take it the way your doctor tells you, and the same way every day.
Dose ranges used in studies, by condition: CBD Guide · Drug interactions