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Essential oil dosing is one of the most fundamental, yet complex skills an aromatherapist must master. When compared to OTC or pharmaceutical products, there are far more variables to consider. Is this product for environmental health? Enjoyment? Medicinal actions? What are the safety ranges, how are they determined, and how do I know where to start?

Unfortunately, many aromatherapists are not trained to calculate doses beyond dilution levels for dermal exposure to skincare products. If this was the case with your training, you’ve been left to guess or piece together bits of information to calculate how to select the right dose for medicinal applications.

Fortunately, you don’t have to rely on guesswork. There are toxicological guidelines and mathematical calculations that can simplify this task, allowing you to focus on the aspects of aromatherapy you love the most. In this 4-week workshop, Dr. Jessie Hawkins and FIW Aromatherapy Chair Christy Hires take you through these processes, empowering you to master them like never before.


This 4- week course is ideal for both professional aromatherapists and for aromatherapy enthusiasts alike. If you have become frustrated trying to determine how to dose essential oils correctly, this course simplifies the process. (Note: The AromaToxicology course is not required as a pre-requisite, but is highly recommended.)

If you are a current FSIHS student in the DipDSS, CertAro, or DipAS program, this material is all covered in your required coursework. If you are an FSIHS graduate, this course will provide extra practice with dosing calculations and review what you have already studied.



  • Toxicological Boundaries for Dosing
  • Dose-Response Curve
  • Therapeutic and Toxic Response Parameters
  • Dose Calculations for Inhalation, Dermal Applications, & Ingestion
  • Dosing Essential Oil Blends
  • Parameters for Acute vs Chronic Doses
  • Impact of Routes of Exposure on Dosing
  • Risk Assessment
  • Formula Calculations


Each week concludes with a formal assessment. Upon successful completion of all four assessments, you will be issued a certificate of completion. The certificate of completion specifies that you have successfully completed 20 contact hours of college continuing education on Dosing & Dispensing.

Because FSIHS is an approved school with NAHA and the NBHWC, CEUs can be used for professional requirements for both aromatherapists and health and wellness coaches. As a fully authorized postsecondary institution, FSIHS CEUs can also be used to renew other professional memberships and licenses.


Registration includes access to the FSIHS Canvas learning management (LMS) system for the delivery of course content. The Canvas system opens to students the midday on the first day of class. Access continues for two weeks after the course ends to allow time for review. Within the Canvas LMS, students will be able to access the course downloads, the live stream video, the question and answer forum, and the required assessments. This system requires high speed internet and intermediate internet skills of each participant.


Full registration is $490. This fee covers all 4 weeks of the course, instructor support, and downloads of key clinical studies that are used in the course discussion and assignments. This also covers graded assessments (1 per week) and the opportunity to earn a CEU certificate upon successful completion.

The course is also available to audit. Auditing participants do not complete assessments, do not receive grades, and are not eligible to earn a CEU certificate. The cost to audit the course is $290.

The total fee is due at the time of registration to reserve your seat in the course. Applicants must be 18 years of age or older and have completed a minimum of high school or the equivalent. Verification of eligibility must be received before the first day of the course.  Full refunds are available until 14 days prior to the event. Cancellations made between more than 7 days but less than 14 days before the event are refundable at 50%. Refunds are not granted for cancellations within a week of the event.



The Franklin Institute of Wellness is proud to be fully authorized to grant college certificates and degrees by the Tennessee Higher Education Commission. This commission oversees college education and ensures that diplomas and certificates issued by the FIW are recognized as legitimate college credentials nationwide.

The Franklin School of Integrative Health Sciences is also an approved school by the National Association for Holistic Aromatherapy and is the only NAHA approved school with a PhD researcher directing the program. FSIHS is also a recognized CEU provider for Board Certified Health and Wellness Coaches (NBC-HWCs) CE #100102.