There is no linear relationship between a given THC percentage and the actual effects you’ll feel. Therefore, we’ve created this guide to help you understand how to interpret the THC levels chart; move past simply looking at the number, and learn about the many variables that influence your experience including the type of cannabis you consume, your physiological make-up and other compounds present in the plant.
The Foundational THC Potency Chart
The standard chart translates a THC percentage to a generalized anticipation of the psychoactive potential of a given product based upon a standard volume of the product being consumed (i.e. one gram of flower).
THC vs. THCA: Why the Label Can Be Deceptive
You may notice two different THC numbers when viewing lab test results or a product’s Certificate of Analysis (COA): Delta-9 THC and THCA (Tetrahydrocannabinolic Acid). THCA is the non-intoxicating acidic version of THC that is found in raw and live cannabis. THCA instantly converts to psychoactive Delta-9 THC when heated through smoke, vaporization or cooking. To get a better idea of a flower’s maximum potential for inducing psychoactivity, you should add the THCA percentage to the THC percentage.
Milligrams vs. Percentage: Measuring Across Product Types
There are primarily two ways to express THC content depending upon the type of product. Flowers (bud) represent THC content as a percentage of milligrams of THC per gram of product. Quantifiable products such as edibles, tinctures and vape cartridges express THC content as milligrams (mg) which represent the total amount of THC contained within the product, per serving or per the entire unit. For example, if you were consuming an edible gummy that contained 10mg of THC and a 1 gram pre-roll that contained 10% THC, they would both contain approximately 10mg of THC. However, the effects produced by each would be significantly different due to the method of ingestion.
Average THC Levels by Product Categories
Methods of consumption greatly affect THC concentrations.
- Flowers (Bud): The most common type of cannabis, flowers have an average THC range of 15-25%. Most flowers found in legal cannabis markets fall between 10-30% THC.
- Concentrates (Wax, Shatter, Live Resin): Concentrated cannabis extracts are made using a variety of extraction methods to isolate THC and other cannabinoids. Typically, concentrates range from 60-90% THC and occasionally even higher.
- Vape Cartridges: Vape cartridge potency varies based upon the type of cannabis oil. Distillate carts can contain over 90% THC, whereas full spectrum oils like live resin are generally around 65-80% THC.
- Edibles: Edible products have THC measured in milligrams per serving or per package. Common dosing guidelines for edibles are generally 5-10mg of THC per serving. Entire packages in some jurisdictions may be limited to 100mg of THC.
Beyond THC: The Importance of Terpenes and the Entourage Effect
While a higher THC percentage does not necessarily equate to a greater or more desirable high, it is likely the most important lesson for consumers. The entourage effect refers to the idea that the complete effects of cannabis result from THC working in conjunction with other cannabinoids (such as CBD and CBG) and aromatic compounds known as terpenes.
Based upon my own experiences as a consumer, I have found that a live resin cart containing 75% THC with a robust terpene profile consisting of myrcene and limonene consistently produces a more complex, satisfying and effective experience compared to a 95% THC distillate cart devoid of nearly all other plant compounds. The terpenes in your cannabis contribute to the characteristics of your high — whether it is uplifting, sedative or focused.
How to Interpret a Cannabis Product Label
Regulated products in a legal cannabis market include significant information to assist in making informed decisions regarding the safe use of cannabis products. When purchasing a regulated cannabis product, always check:
- THC & CBD Content: Represented in mg/g (percentages) or mg/unit.
- Total THC/Total CBD: Represents the total amount of THC/CBD available after heating (activation) which represents the most important number in determining the expected effects.
- Strain Name or Type (Indica, Sativa or Hybrid).
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Packaged Date and Lot Number.
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Health Warning Messages.
What "Strongest Strains" Really Means in 2025
As breeders continue to push the limits of THC percentages in cannabis, there are several strains that are currently among the highest THC percentages that exist. Examples include Jenny Kush (29-42% THC), Dulce (26-39% THC) and Alien Mints (28-34% THC). However, as explained earlier, the specific terpene composition of each strain defines the distinct effects of each strain — ranging from energizing and stimulating to deeply calming.
The Best THC Percentage for New Consumers
For those who are new to cannabis, we recommend that you begin with lower levels of THC. When selecting a flower product, we suggest choosing a product that contains less than 15% THC. Additionally, select a product that contains a balanced ratio of THC to CBD. CBD can counteract some of the effects of THC and cause feelings of anxiety. If you’re consuming edible products, begin with a low dose (2.5mg or less) and allow at least two hours to pass before deciding to ingest more. Since edibles take longer to take effect, but produce more intense and long lasting effects than smoked or vaped cannabis, it is essential to plan ahead.
Regulatory Environment and Market Factors
To fully understand THC levels, one must also understand regulatory factors.
- Federal vs. State Law: Cannabis remains a Schedule I controlled substance at the Federal level although the DEA is revisiting its classification. Currently, twenty-four states have legalized adult-use of cannabis and forty states have comprehensive medical programs.
- The 0.3% Rule: Hemp is defined federally as cannabis that contains less than 0.3% Delta-9 THC by dry weight. Many products (including edibles and THCA flower) are marketed and sold as hemp-based products; however, the potential total THC content in these products after activation can be significantly higher than indicated by the label.
Personal Insights and Responsible Consumption
During my time as a cannabis consumer, I have found that obsessively focusing on finding the highest THC percentage in cannabis has resulted in unfulfilling and one dimensional effects. I have discovered that the most consistent and enjoyable experiences occur from either a mid-potency flower product (18-22% THC) that has a diverse and vibrant terpene profile, or a full-spectrum concentrate product that has a similar terpene profile.
It is imperative to remember that your tolerance, metabolism, current emotional state, environment and the lab tested data are equally important factors in the overall cannabis experience. While the THC levels chart can serve as a good initial reference point, it is far from the last word. Ultimately, responsible cannabis consumption includes understanding the potency of a product, adhering to local laws and regulations and being aware of how your body responds to various products.