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Essential Oil Conversion Chart, Calculator & Pro Tips

Bottles of essential oils and droppers on wooden table with marble slab.

Working with essential oils can be exciting, inspiring, and confusing all at the same time. There's a good bit of non-intuitive math involved. We purchase in ounces or milliliters, but then often measure and blend in parts, teaspoons, or drops. Such discrepancies can quickly become VERY confusing, not to mention stressful—essential oils are precious and potent, after all, so correct measurements are important to achieving safe, consistent results.

Converting Between Essential Oil Measurements

Following and formulating recipes with essential oils can be tricky. When crafting aromatherapy or body care creations for personal use, the potent nature of essential oils often means that only tiny volumes are needed, so it makes sense to measure amounts in drops. However, for those looking to make larger batches to give away or sell, counting out several hundred drops of liquid is simply not practical (drops are also not very reliable on a larger scale; see tips below). If you've ever wondered how to convert drops into standardized units like milliliters, teaspoons, and ounces, you aren't alone!

We often receive questions from friends and followers frustrated by all the different ways essential oil recipes provide measurements. We hate to see a lack of information holding herbalists back, so we’ve put together some helpful tools to make measuring and scaling your essential oil recipes faster, easier, and more accurate!

Tips for Measuring Essential Oils

  • There are technically 29.57 mL in one fluid ounce. When working in recipes with total volumes up to four ounces, we tend to round this number to 30 mL (beyond this scale, those missing 0.43 mL start to add up and impact your results).
  • Use a measuring tool that makes sense, opting for drops when needed and teaspoons when appropriate.
  • There are approximately 20 drops in 1 milliliter.
  • These measurements should be considered estimates. Not all essential oil drops are equal; differences in viscosity will impact the volume of an oil that holds together in a drop.

Essential Oil Conversion Chart

Info-graphic of essential oil measurement conversion chart

Essential Oil Conversion Calculator

 

 

Need Help finding the Right Essential Oil to Carrier Ratio?

Try Our Dilution Guide and Calculator!

You may also be interested in: 

Essential Oil Conversions Made Easy Pin for Pinterest by Mountain Rose Herbs  

This blog was originally published in 2013. Because it's so popular, we decided to update it for you. Enjoy!  


Topics: Aromatherapy, Natural Body Care

Christine

Written by Christine on March 1, 2019

As Products Manager, Christine Rice has been working with the botanical goodies at Mountain Rose Herbs for over 14 years. With a Certificate in Aromatherapy from The American College of Healthcare Sciences, she works closely with the essential oils and hydrosols that we offer. She connects with the aromatherapy industry through our National Association of Holistic Aromatherapy business membership and contributes on working committees with The American Herbal Products Association. In addition to her love for aromatics and blending essential oils, Christine can be found gardening and exploring the beautiful Pacific Northwest. She enjoys canning and preserving food, knitting when she has time, and keeps busy with her energetic daughter.

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