PLENNY LEARN · LAB REPORTS AND TERPENES
Read terpene percentages with the units in view
A terpene percentage by weight describes how much of the tested sample consists of the reported terpenes. One percent equals 10 milligrams per gram. The number can help describe composition, but it is not a complete aroma, safety or quality score.
By Plenny · Updated September 18, 2026 · 4 minute read
What does terpene percentage mean?
When a report uses percent by weight, a result of 1% means one part terpene by mass in every 100 parts of the sample. A result of 2% corresponds to 20 mg per gram on that same reporting basis.
First check whether the figure describes an individual compound, such as limonene, or the total of a panel. Also check the sample type and whether the report uses dry weight or an as-received basis. Changing the denominator changes the meaning of the number.
A chart can instead show each compound as a share of the measured terpene profile. In that case, “40% myrcene” does not necessarily mean that 40% of the whole flower is myrcene. Read the chart heading and legend before comparing it with a weight percentage.
How to convert terpene percent to mg/g
For a mass percentage and milligrams per gram on the same basis, the conversion is straightforward:
Percent × 10 = mg/g
mg/g ÷ 10 = percent
| Percent by weight | Milligrams per gram |
|---|---|
| 0.1% | 1 mg/g |
| 0.5% | 5 mg/g |
| 1% | 10 mg/g |
| 2% | 20 mg/g |
| 3% | 30 mg/g |
These examples explain units only. They do not specify a dose, a target concentration or how much reaches the body.
Worked example: a report lists 7.5 mg/g
Divide 7.5 by 10. The result is 0.75% by weight. The values describe the same concentration when the reporting basis is unchanged.
Worked example: myrcene is 40% of a 2% terpene total
If the chart expresses a mass-based share of that total, multiply 0.40 by 2%. Myrcene would represent 0.8% of the sample, or 8 mg/g. This calculation does not apply automatically to a chart based on uncalibrated instrument peak areas.
What is included in total terpenes?
Start with the laboratory’s definition of its total and the compounds included in its panel. Do not assume the three biggest bars represent every tested compound. SC Labs explains that its summary shows the three most prominent terpenes, with a more complete list on subsequent pages.
If a panel reports 0.60%, 0.40%, 0.25% and 0.15% for four separate compounds, their sum is 1.40%. That is a total for those four results. It does not tell you the concentration of an untested compound.
Compare like with like: the same product type, reporting basis, units and panel coverage. Check which compounds are included rather than assuming two laboratories use identical panels. Published laboratory method details show how individual analytes have their own detection and quantitation limits.
What do LOD and LOQ mean?
LOD is the limit of detection. LOQ is the limit of quantitation, the lower boundary for reliable numerical measurement. SC Labs reports results between its LOD and LOQ as “<LOQ”. Follow the legend on the report you are reading.
A below-limit result is not an exact measured zero. Avoid substituting an invented value when checking a total. Small differences can also arise because displayed rows are rounded.
What is a good terpene percentage?
A percentage alone cannot establish that a sample is “good.” It describes a measured concentration, while quality depends on the question being asked. Aroma, contamination testing and consistency require additional evidence.
A 2023 chemical and sensory study found that minor nonterpenoid compounds helped distinguish aromas across cannabis samples with similar terpene expression. It analyzed ice hash rosin extracts, so its results should not be treated as a universal ranking of flower.
The study also disclosed commercial affiliations and patents related to its findings. Its useful takeaway here is narrow: a terpene total does not capture the entire aroma mixture.
Likewise, a terpene panel does not replace tests for pesticides, heavy metals or microbes. The California Department of Cannabis Control lists these as separate testing categories. Requirements differ by jurisdiction, but the measurements answer different questions.
A quick report-reading checklist
For the rest of the document, use our guide to reading a cannabis COA.
Common questions about terpene percentages
Is 2% terpenes the same as 2 mg/g?
No. Two percent by weight equals 20 mg/g. Two mg/g equals 0.2%, provided both use the same reporting basis.
Does a higher total mean a stronger smell?
Not reliably on its own. The identities and proportions of aroma compounds matter, and a terpene panel does not measure every odor-active compound.
Does terpene percentage measure THC?
No. THC and terpene results are separate measurements. A terpene percentage is not a THC potency result or a prediction of intoxication.
Why does a terpene pie chart add up to 100%?
It may describe relative shares within the reported profile. That is a different denominator from the weight of the entire sample. Check the legend.
Keep exploring
Numerical examples are hypothetical and are not Plenny batch results. Sources are linked beside the relevant explanations.
Chris Garcia, Owner and CEO
September 18, 2026
How this page is prepared: Plenny uses linked research and other relevant sources for educational explanations, and product details and batch COAs where relevant. General strain, flavor, and effect descriptions are not guarantees.
Commercial transparency: Plenny sells products discussed on this website. Educational pages are not medical or legal advice, and content is not medically reviewed unless a named licensed reviewer is shown.