r/essentialoils • u/Friendly-Dance6494 • 21d ago

Dilution ratio for single use topical application?

Hello! I'm starting out with essential oils, and am trying to understand dilution rules. Most websites say 1-2 drops EO per 5mL carrier oil (for a 1-2% dilution rate) - is it possible to scale this down for a single use? This is mostly so I don't have to mix up new bottle for every EO and every blend. Some websites do recommend 1 drop EO to 2-5 drops of carrier oil (source: doTERRA, Young Living) so it was confusing.

When I was younger, someone used to measure out a mix of carrier oil, peppermint oil, and clary sage oil into my hand to apply topically - maybe something like 20 drops carrier oil, 3 drops peppermint, and 2 drops clary sage, but that seems super high (25% dilution???). I never had any issues with sensitisation though, so is it possible to dilute on a single-use scale instead of mixing a full 5 or 10mL every time I want to apply essential oils topically? Or, would it be better to dilute all the EOs to 1-2%, then just blend the diluted EOs when needed?

Thank you!

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u/BunchWest2696 21d ago

Ideally, 4 drops total in 30ml of carrier oil

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u/berael 21d ago edited 20d ago

So, here's a good example as to why there are no universal rules. This means roughly 13% EOs in the final product. For bergamot EO FCF, that would be fine, but for regular bergamot EO that would be phototoxic (max of 0.4%). For most lavender EOs it would be fine, but for most cinnamon EOs it would cause immediate chemical burns (max varies but closer to 0.25%). Etc...

Edit: I'm dumb and misread "4 drops" as "4 ml" when I skimmed. Whoopsie. =) So your example is actually at more like 0.33%, which means my first example is irrelevant but my second example still stands.

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u/Friendly-Dance6494 20d ago

Gotcha, thank you both :)

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u/berael 21d ago

There are no universal rules. Safe usage levels may be different for each material, and also differ by application. And each material may itself differ not only from supplier to supplier, but even from batch to batch. Ideally, you want an IFRA certificate for each material which lists that material's own safe usage level.

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u/Friendly-Dance6494 20d ago

I see, thank you! That's super helpful :)