Use and care
How to dilute essential oils for skin: read the instructions first
Dilution is more than a drops-per-bottle calculation. Understand the base, the permitted application and what a percentage means before preparing a mixture for skin.
TerraOils is an independent Nova Group-operated dōTERRA Wellness Advocate store. This guide was prepared by the TerraOils Editorial Team.
Diluting an essential oil means reducing its concentration in a suitable base. For a product intended for skin, that often means the carrier specified in its directions. It does not mean that every essential oil becomes suitable for skin once another ingredient is added.
The most useful starting point is the exact product and intended use. A percentage chart can help explain arithmetic; it cannot decide whether a formula is appropriate for you.
Start with the label, not a universal recipe
Check whether the product is intended for topical use. Then identify the instructions for the application you have in mind. Massage, personal fragrance and a finished skincare product are not interchangeable contexts.
For example, the regional dōTERRA Lavender page gives a massage instruction of five drops in 10 ml of carrier oil. That is a product-specific direction—not a rule for all oils, all body areas or every person. Follow the current instructions for the bottle you have, and ask for clarification if its safety information conflicts with the website.
Some oils require more restrictive limits than others. A general dilution range should never override an individual product's maximum or cautions. 1
Carrier oil, water and a finished cosmetic are different things
A suitable carrier is the base in which the essential oil is diluted for its permitted application. Read its own ingredients and directions too, particularly if you have known sensitivities.
Water is not an equivalent substitute. Essential oils do not dissolve evenly in water, and salt does not solve that problem. Dropping oil into bath water is therefore not the same as preparing an evenly diluted topical mixture. 2
Likewise, do not assume that adding an essential oil to any shop-bought cream produces a suitable new formula. The original cosmetic was supplied as a finished product. For the simplest routine, use a finished product as directed or a preparation explicitly described in the oil's instructions.
What does a percentage actually mean?
A percentage needs a defined basis. For a volume-by-volume calculation, the equation is:
Essential-oil volume ÷ finished mixture volume × 100 = percentage.
As an arithmetic example only, 0.1 ml of essential oil in a finished 10 ml mixture is 1% by volume. The remaining volume would be 9.9 ml of a compatible base. This explains the calculation; it is not a recommendation to make or use a 1% mixture of any particular oil.
A recipe measured by weight uses a different basis. Do not swap grams and millilitres without accounting for the materials involved. Nor should a precise-looking number on a homemade label imply that the product has been professionally assessed.
Why we do not give a universal “drops per bottle” chart
A drop is a practical dispensing unit, not a fixed laboratory volume across every oil and dispenser. A chart based on an assumed number of drops per millilitre is an approximation, not a guarantee of the resulting concentration. 1
When a manufacturer gives drop-based directions for its product, follow that specific direction. Do not turn it into a supposedly exact percentage using an unrelated online chart.
Also count the combined essential-oil amount, not a separate allowance for every oil. Adding several oils does not give each one its own full concentration allowance. A multi-oil preparation needs to respect both the overall composition and restrictions on individual ingredients.
A preparation checklist worth keeping
Before preparing anything, you should be able to answer these questions:
| Question | What a usable answer looks like |
|---|---|
| Which product is this? | Exact name, format and identifiable label |
| Is the application permitted? | A matching instruction, not a social-media tip |
| Which base and quantity? | The materials and amounts stated for that use |
| Are there relevant cautions? | Skin, sun exposure, age or personal circumstances checked |
| Can I identify it afterwards? | A clearly labelled container kept away from children and pets |
Record what you made and when. Do not prepare a large supply simply to use up a bottle, or invent a shelf life for a homemade mixture. Our storage and responsible-use guide covers keeping products identifiable.
When a prepared roll-on may be simpler
A finished topical product can remove a preparation step. However, “roll-on” describes the applicator, not a universal formula or safety status. Check the actual product rather than assuming every roller contains the same concentration.
Lavender Touch is one example of a product supplied with a carrier and its own instructions. It is a different purchase from standard Lavender, not a smaller bottle of the same concentrate.
When to stop and ask for advice
Do not use a general chart to devise routines for infants, children, pregnancy, breastfeeding or a health condition. Seek appropriately qualified advice and follow product restrictions. Dilution also does not make a known allergen suitable for someone who reacts to it.
If a product causes irritation, stop using it; persistent or significant symptoms need medical advice. Breathing difficulty is an emergency. 3
Does dilution remove phototoxicity warnings?
Not automatically. Some products have sun and UV restrictions. Follow those instructions and read our guide to citrus oils and sunlight.
Can I use water instead of a carrier oil?
Not to create an evenly diluted topical oil mixture. Dispersion in water and dilution in a suitable base are different formulation questions.
Is “more diluted” the same as “suitable for everyone”?
No. Suitability also depends on the ingredient, application, person and cautions. A lower concentration is not a universal permission to use a product.
Sources
- Dilution for essential oils — Tisserand Institute.
- Bath safety and essential oils — Tisserand Institute.
- Essential oils: poisonous when misused — National Capital Poison Center.
Sources checked on 8 September 2026. Product information can change; confirm the current instructions for the exact product.
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