THCa to THC
Enter a THCa mass to calculate potential THC and CO2 released.
Input parameters
Starting or target mass
Equation
Calculation method Equation, inputs and limitations
About the THCa conversion factor
At complete decarboxylation, every mole of THCa produces one mole of THC and one mole of CO2. The bulk-mass factor is 314.46 ÷ 358.47 ≈ 0.87723, using reference molar masses (PubChem CID 16078 and 98523; NRC Canada). A 10 g pure THCa sample therefore has a theoretical THC yield of approximately 8.772 g.
The reverse mode calculates the starting acid mass corresponding to a target THC mass. It does not describe a physically reversible reaction or an experimental recovery prediction.
Questions & limitations 3 answers
How much THC can 1 gram of THCa theoretically produce?
At complete conversion, 1 gram of pure THCa corresponds to about 0.877 grams of THC. The remaining mass is released as carbon dioxide. This is a stoichiometric ceiling, not a guaranteed measured yield.
Why is the conversion factor 0.87723?
The bulk molar-mass ratio of THC (314.46 g/mol) to THCa (358.47 g/mol), consistent with PubChem and NRC reference materials, determines the theoretical retained mass after CO2 release.
Does the reverse setting convert THC back into THCa?
No. Reverse mode calculates the THCa starting mass equivalent to a desired THC output. It does not model an actual reverse reaction.