Total THC Explained — The Real Math Behind Legal Hemp
Read any StreetStem COA like a pro. Learn the Total THC equation, why it matters for THCa flower, and how to verify every batch.
In 2025, most regulators and labs do not look at Delta-9 alone. They use Total THC, which counts the potential conversion of THCa during heat. This guide shows the simple math, then points you to our COA Archive so you can check the numbers yourself for any StreetStem batch.
The Formula
Total THC = (0.877 × THCa) + Δ9-THC
The 0.877 factor accounts for the loss of mass when THCa converts to Delta-9 during heat. Many states use this calculation to decide if hemp passes the 0.3 percent limit on a dry weight basis.
Quick Example
Suppose a flower COA shows THCa 20.0% and Δ9-THC 0.15%.
Total THC = (0.877 × 20.0) + 0.15 = 17.54% + 0.15% = 17.69%
This number is far above 0.3 percent, which explains why high THCa flower is often regulated strictly unless a state uses a different standard. The key is to read both values on the COA and understand what your state looks at.
Why Total THC Matters
- Clarity: It reflects what happens when flower is heated, not just stored in a jar.
- Consistency: It is the common method many labs and regulators rely on for compliance decisions.
- Trust: Posting the math next to the COA builds confidence and reduces confusion at checkout.
How to Read Any StreetStem COA
- Open the COA Archive and pick your strain and batch.
- Confirm the potency block shows THCa % and Δ9-THC %. Many labs also display Total THC directly.
- Check the batch ID, harvest date, and lab name. Look for an ISO 17025 mark where applicable.
- Scan the safety panel for pesticides, heavy metals, microbials, and residual solvents where relevant.
Smalls vs Full Bud — What the Math Does Not Tell You
Total THC is only part of the story. Smalls and full buds from the same harvest share the same profile, yet they land differently on structure, aroma, and visual appeal. Use the COA for truth, then let your nose and grind decide the lane you prefer.
Mini FAQ
Do all states use Total THC?
Many do. Some focus on Δ9 only for certain categories. When in doubt, check local guidance before purchase.
Where can I see the numbers for my jar?
Every batch is posted in our COA Archive with direct PDF links.
What does the 0.877 factor mean?
It is a molecular conversion factor that estimates the part of THCa that becomes Delta-9 during heat.
Educational content for adults 21 plus. Based on common lab practice in 2025. Always verify local rules before purchase.
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