Table of Contents
- Essential Oil Dilution Calculator
- Why Dilute Essential Oils?
- Which Dilution Should You Use?
- Essential Oil Dilution Chart
- Common Oils With Lower Maximum Dilutions
- Choosing a Carrier Oil
- Baths, Sprays and Other Water-Based Recipes
- When You Don't Need to Dilute
- Free Dilution Chart Cheat Sheets
- Keep Exploring
- FAQs
Updated October 2026
To dilute essential oils, mix them into a carrier oil like jojoba or fractionated coconut oil before they touch your skin. I use 1% for the face and sensitive skin, 2 to 3% for everyday adult use, and up to about 5% only for short-term use on a small spot. For a 10 ml roller, that's 2 drops for 1% and 4 drops for 2%.
Below you'll find my free dilution calculator, which dilution to use for whom, my full dilution chart, oils that need lower limits and a free printable. Jump to the calculator or the dilution chart.
Essential Oil Dilution Calculator
Use the first part to check the strength of a recipe you already have, and the second part to find out how many drops to add to a bottle.
1. What's my dilution?
Enter your total drops of essential oil and how much carrier oil you're using.
2. How many drops do I need?
Pick your bottle size and the dilution you want.
Based on about 20 drops per ml. Drop sizes vary between bottles, so treat results as a close guide. Some oils have lower limits, listed below.
Why Dilute Essential Oils?
Essential oils are extremely concentrated. That's one reason we love them so much, but with great power comes great responsibility. Dilution is the step that makes topical use safer and, honestly, more pleasant.
- It lowers the chance of irritation and sensitization, a lasting skin reaction that can show up after repeated undiluted use.
- Essential oils evaporate more slowly in a carrier, so they stay on your skin longer.
- It makes a blend easy to spread over a larger area.
- You use fewer drops, so your oils last longer.
- You get the skin-loving benefits of the carrier oil too. Oh yeah!
After reading these, how can you not dilute? And no, laziness isn't a good excuse.
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Which Dilution Should You Use?
| Dilution | Who and What It's For |
|---|---|
| 0.5 to 1% | Face, very sensitive skin, older adults, and anyone pregnant or nursing (after checking with your doctor) |
| 1% | Kids ages 6 to 11, with kid-safe oils only |
| 1 to 2% | Massage oils, body oils, lotions and body butters, since they cover a lot of skin |
| 2 to 3% | Everyday use for adults and teens 12+ |
| 3% | Hands, feet and smaller areas |
| Up to 5% | Short-term use on a small spot only, like a roller for a tight shoulder |
A note on kids: I don't use peppermint or rosemary for children under 6, or eucalyptus for children under 10. For little ones under 6, please check with your pediatrician before using essential oils on their skin. Gently diffusing a kid-friendly oil like lavender for a short time is a softer place to start.
Essential Oil Dilution Chart
Find your bottle or batch size on the left, then read across to see how many total drops of essential oil to add. If your blend uses three oils, the drops are shared between them.
| Carrier Oil | 0.5% | 1% | 2% | 3% | 4% | 5% |
|---|---|---|---|---|---|---|
| 5 ml (1 tsp) | — | 1 | 2 | 3 | 4 | 5 |
| 10 ml (2 tsp, roller) | 1 | 2 | 4 | 6 | 8 | 10 |
| 15 ml (1 Tbsp, ½ oz) | 1 to 2 | 3 | 6 | 9 | 12 | 15 |
| 1 oz (30 ml, 2 Tbsp) | 3 | 6 | 12 | 18 | 24 | 30 |
| 2 oz (60 ml, ¼ cup) | 6 | 12 | 24 | 36 | 48 | 60 |
| 4 oz (120 ml, ½ cup) | 12 | 24 | 48 | 72 | 96 | 120 |
Please keep in mind this chart is a guideline, not a hard rule. When counting drops, I always get that one stubborn drop that won't come out, and then BOOM, two come out at once. Argh! It's OK. Drops aren't a perfectly exact measurement, because oils vary in thickness and droppers vary in size. Being a drop off won't make a meaningful difference.
Common Oils With Lower Maximum Dilutions
The chart above works for most oils, but some need a lower limit no matter what you're making. The maximum applies to that one oil, not your whole blend. These are the ones I see most often in home collections. The numbers come from Tisserand and Young's Essential Oil Safety (2nd edition), except tea tree, where I use my own more cautious limit. For more than 50 oils, see my full maximum dilution list.
| Essential Oil | Max | Note |
|---|---|---|
| Cinnamon bark (Cinnamomum verum) | 0.07% | Too strong for most skin recipes. Keep it in the diffuser. |
| Cassia (Cinnamomum cassia) | 0.05% | Diffuser only. |
| Clove bud (Syzygium aromaticum) | 0.5% | 1 drop in a 10 ml roller is already 0.5%. |
| Cinnamon leaf (Cinnamomum verum) | 0.6% | Gentler than bark, but still very low. |
| Lemongrass (Cymbopogon flexuosus) | 0.7% | A common skin sensitizer at higher amounts. |
| Ylang ylang (Cananga odorata) | 0.8% | 1 drop per 10 ml roller. |
| May chang (Litsea cubeba) | 0.8% | Lemony and strong. |
| Rose otto (Rosa damascena) | 0.6% | A little goes a long way anyway. |
| Oregano (Origanum vulgare) | 1.1% | A "hot" oil that can irritate. |
| Thyme, thymol type (Thymus vulgaris) | 1.3% | Another "hot" oil. |
| Myrrh (Commiphora myrrha) | 1% | Avoid during pregnancy and breastfeeding. |
| Siberian fir (Abies sibirica) | 1% | Balsam fir is much higher (10%), so check which fir you have. |
| Black spruce (Picea mariana) | 1% | Use fresh oil. Old conifer oils are more irritating. |
| Spearmint (Mentha spicata) | 1.7% | Lower than peppermint, which surprises a lot of people. |
| Frankincense (Boswellia carterii) | 2% | See my frankincense essential oil guide. |
| Himalayan cedarwood (Cedrus deodara) | 2% | Atlas, Texas and Virginian cedarwood are higher (8%). |
| Wintergreen (Gaultheria procumbens) | 2.4% | Adults only. Avoid with aspirin sensitivity or blood thinners, and during pregnancy and breastfeeding. |
| Tea tree (Melaleuca alternifolia) | 3% (my max) | Published limits are higher, but I keep it at 3% and use fresh oil. See my tea tree essential oil guide. |
Sun-Sensitive Citrus Oils
Some cold-pressed citrus oils can cause a serious skin reaction if your skin sees sunlight or a tanning bed within 12 hours. These limits are for skin that will be in the sun. Steam-distilled and FCF (bergapten-free) versions don't carry this risk, and sweet orange, tangerine and mandarin aren't sun-sensitive.
| Cold-Pressed Oil | Max on Sun-Exposed Skin |
|---|---|
| Bergamot (Citrus bergamia) | 0.4% |
| Lime (Citrus aurantifolia) | 0.7% |
| Bitter orange (Citrus aurantium) | 1.25% |
| Lemon (Citrus limon) | 2% |
| Grapefruit (Citrus paradisi) | 4% |
Learn more in my photosensitive essential oils guide.
Choosing a Carrier Oil
Any good carrier oil can dilute essential oils. These are the ones I use most:
- Jojoba: my all-time favorite. It's technically a liquid wax, very close to the oil your skin makes, and it keeps for a long time. Great for the face and rollers. See my jojoba spotlight.
- Fractionated coconut oil: clear, scentless and stays liquid, with a long shelf life. A fan favorite for rollers and bath oils.
- Avocado: rich and slow to absorb, lovely for dry skin, heels and massage. See avocado oil as a carrier oil.
- Sweet almond: soft, smooth and nourishing. A wonderful massage oil. Skip it if you have a nut allergy.
- Rosehip: a light, dry-feeling oil that's a favorite for mature skin. I mix a little into another carrier. Read my rosehip oil guide, or here's the rosehip oil I've used (affiliate link).
Compare more in my list of 25 carrier oils and best non-comedogenic carrier oils.
Baths, Sprays and Other Water-Based Recipes
Oil and water don't mix, so essential oils dropped into a bath or spray bottle float on top in little undiluted droplets that can land right on your skin. Always disperse them first:
- Baths: Mix your essential oils into 1 Tbsp of carrier oil or castile soap before adding them to the water. Bath salts alone don't disperse oils. Here's how to use essential oils for bathing.
- Sprays: Mix your oils into high-proof alcohol or a solubilizer before adding water, and shake before each use. See homemade essential oil sprays made easy.
When You Don't Need to Dilute
When you're simply smelling an oil, like from the bottle, on a tissue, in a personal inhaler or in a water-based diffuser, there's no need to dilute. In fact, never add carrier oil to your diffuser, because it won't evaporate and it can clog the machine. Here's how to use an essential oil diffuser, and how inhalation compares to skin use in topical vs inhalation.
Dilution Safety Basics
- Patch test new blends on your inner arm and wait 24 to 48 hours. Here's how to do a patch test.
- If a blend irritates your skin, apply plain carrier oil, wipe it off, then wash with gentle soap and water.
- No peppermint or rosemary for kids under 6, and no eucalyptus under 10.
- Check with your doctor if you're pregnant or nursing.
- Never ingest essential oils.
- Store oils and blends cool, dark and capped, and label them with the oils, dilution and date.
Free Dilution Chart Cheat Sheets
Get an instant PDF download of the dilution charts for the six most-used sizes: 5 ml, 10 ml, 15 ml, 1 oz, 2 oz and 4 oz. If you find it helpful, please share this post so others can grab the free diluting essential oils guide too.
Keep Exploring
- Maximum dilution for essential oils: safe limits for 50+ oils
- Recipes for essential oil roller bottles
- Fractionated coconut oil vs jojoba for rollers
- Where to use essential oils topically
- 7 essential oil safety tips for beginners
- 5 best carrier oils for essential oils
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