This page is for aromatherapists preparing for the Aromatherapy Registration Council (ARC) exam, which has up to 250 multiple-choice questions in 4 hours. It has free practice sets by topic, worked explanations for sample questions, a map of the official content areas, a study plan and the key exam facts. Each fact is checked against ARC's own pages.
According to Aromatherapy Registration Council, “composed of a maximum of 250 multiple-choice, objective questions with a total testing time of four (4) hours.”[1]
The Aromatherapy Registration Council runs the Registered Aromatherapist exam. It checks that you have the knowledge expected after professional training. To be eligible, you need to have finished a professional aromatherapy course of at least 200 hours that includes 15 case studies, or an equivalent. ARC's eligibility page explains how it judges equivalence, so read it before you apply if your training was different.
The exam has a maximum of 250 multiple-choice questions and a total testing time of 4 hours. You can take it at a Prometric computer-based testing center or by live remote proctoring managed by Prometric. You cannot book any day you like. Testing runs in set windows: March 6-27, 2027 and September 4-25, 2027. Score reports come about 4 weeks after the testing period closes, not on test day.
The application fee is US $370. It includes testing center fees and a non-refundable $75 administrative fee. If you do not pass, you pay the full examination fee again to retake. Your registration is recognized for up to 5 years from the date of issue. To keep it, you either retake and pass the current exam or meet the continuing education requirements. Fees, dates and rules can change. Check the current ARC Handbook and aromatherapycouncil.org before you apply.
The Aromatherapy has 250 questions, takes about 4 hours and costs $370[1] (Aromatherapy Registration Council, verified Oct 25, 2026).
Numbers in brackets link to the official sources listed under Sources & last verified. Dates that have passed are removed automatically.
| Item | Detail | Source · Verified |
|---|---|---|
| Number of questions | Up to 250 multiple-choice questions[1] | Aromatherapy Registration Council · Oct 25, 2026 |
| Time limit | 4 hours[1] | Aromatherapy Registration Council · Oct 25, 2026 |
| Exam fee | US $370 application fee[1] | Aromatherapy Registration Council · Oct 25, 2026 |
| Retake fee | Full examination fee again[1] | Aromatherapy Registration Council · Oct 25, 2026 |
| Validity | 5 years[1] | Aromatherapy Registration Council · Oct 25, 2026 |
| Renewal | Retake and pass the exam, or meet continuing education requirements[1] | Aromatherapy Registration Council · Oct 25, 2026 |
| Delivery | Prometric test centers or live remote proctoring[1] | Aromatherapy Registration Council · Oct 25, 2026 |
| Eligibility | 200-hour aromatherapy course with 15 case studies, or equivalent[2] | Aromatherapy Registration Council · Oct 25, 2026 |
| Score release | About 4 weeks after the window closes[1] | Aromatherapy Registration Council · Oct 25, 2026 |
| Testing window (March 2027) | March 6-27, 2027[3] | Aromatherapy Registration Council · Oct 25, 2026 |
| Testing window (September 2027) | September 4-25, 2027[3] | Aromatherapy Registration Council · Oct 25, 2026 |
The content areas below are copied from the official Aromatherapy content outline published by Aromatherapy Registration Council, with the share of the exam each area carries. The right-hand column shows which of our practice sets covers it.
| Official content area | Weight | Practice on this site |
|---|---|---|
| Administration[4] | 30% | Aromatherapy Carrier Oils and Dilution Practise choosing carrier oils, working out safe dilutions and matching the method of application to the client and the route of use. |
| Basic Concepts of Aromatherapy[4] | 20% | Aromatherapy Essential Oil Extraction Methods Practise how oils are extracted, where aromatherapy came from, and the core terms used to describe oils, plants and blends. |
| Professional Issues[4] | 20% | Aromatherapy Safety and Practice Practise safety precautions, contraindications, first aid for exposures, client intake and record-keeping, and the limits of an aromatherapist's scope. |
| Scientific Principles[4] | 30% | Aromatherapy Essential Oil Chemistry Practise naming the main chemical families in essential oils, linking constituents to effects and risks, and basic anatomy and physiology of absorption. |
Prepare for the Aromatherapy exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.
Question: Which carrier oil has the highest oleic acid content and is known for its exceptional skin penetration and moisturizing properties?
Answer: C. Olive oil
Explanation:
Olive oil is correct. Oleic acid is a monounsaturated fatty acid, and olive oil is the carrier best known for being rich in it. That gives it a heavy, softening feel that suits dry skin.
Jojoba is really a liquid wax made of wax esters, not a typical triglyceride oil. It is valued for being stable and similar to sebum, not for its oleic content. Rosehip seed oil and grapeseed oil are mostly polyunsaturated linoleic acid (rosehip also has alpha-linolenic acid). That makes them lighter oils that oxidize faster.
Rule to remember: learn each carrier's main fatty acid. Oleic-rich oils feel richer and keep longer. Linoleic-rich oils feel lighter and go rancid sooner.
Question: Which essential oil is most studied for topical application to support wound healing and reduce infection risk?
Answer: B. Tea tree (Melaleuca alternifolia)
Explanation:
Tea tree (Melaleuca alternifolia) is correct. Of these oils, it has the largest body of research on antimicrobial activity, including laboratory and clinical studies on skin and wound infections. That is why it is the standard answer for topical wound support.
Bergamot is studied mainly for mood and anxiety, and the expressed oil can be phototoxic on skin. Lemongrass does have antimicrobial activity, but it is rich in citral, a known skin sensitizer, so it is a poor choice for broken skin. Cedarwood is used mostly in calming blends and has little wound-care evidence.
Rule to remember: pick an oil on both its evidence and its safety profile. Treat broken skin as a higher-risk route that needs lower dilutions.
Question: What should you do first if an essential oil gets into the eyes?
Answer: A. Flush with a carrier oil, then seek medical help
Explanation:
The right answer is to flush with a carrier oil, then seek medical help. Essential oils dissolve in fat, not water, so a fatty carrier such as a vegetable oil dilutes the oil and lifts it off the eye better than water alone. Then get medical help, because an eye exposure can injure the eye.
Rinsing with more essential oil only adds more irritant. Rubbing the eyes spreads the oil and can scratch or irritate the cornea. Applying water only and ignoring it is wrong because water does not mix well with the oil, and an eye exposure should never be ignored.
Rule to remember: dilute an undiluted oil exposure with a fatty carrier, never with more essential oil, and get medical care for any eye exposure.
Start with the official ARC Handbook and its content outline so you know how much each area counts. Administration and Scientific Principles carry the largest share, so give them most of your time.
The application fee is US $370. It includes testing center fees and a non-refundable $75 administrative fee. If you do not pass and want to retake the exam, you pay the full examination fee again. Fees can change, so check the current ARC Handbook before you apply.
The exam runs only in set testing windows: March 6-27, 2027 and September 4-25, 2027. You can test at a Prometric computer-based testing center or by live remote proctoring managed by Prometric. Confirm the current dates on the ARC test dates page.
The exam has a maximum of 250 multiple-choice, objective questions, with a total testing time of 4 hours. The questions cover Administration, Basic Concepts of Aromatherapy, Professional Issues and Scientific Principles, as set out in ARC's content outline.
You need to have finished a professional aromatherapy course of at least 200 hours that includes 15 case studies, or an equivalent. If your training was different, read ARC's eligibility page to see how it judges equivalence before you pay the application fee.
Score reports come about 4 weeks after the testing period closes, not on the day you test. If you test early in a window, expect to wait longer, because the clock starts when the whole window ends.
ARC e-certificates are recognized for up to 5 years from the date of issue. To keep your registration, you either retake and pass the current exam or meet ARC's continuing education requirements. The handbook explains the details.
How we verify: editorial & fact-checking policy. Report an error: contact us.