Free Professional Tool

ROSIN DECARB CALCULATOR

Model temperature, time, and processing conditions for optimal decarboxylation

QUICK PRESETS

TEMPERATURE

230°F0h 0min

120°F300°F

TARGET CONVERSION

98%Near complete

BATCH MASS

200g

50g500g

THCA POTENCY

650 mg/g65.0%

100 mg/g (10%)900 mg/g (90%)

CBDA POTENCY (Optional)

0 mg/g0.0%

VESSEL TYPE

AGITATION LEVEL

PROCESS TIME

0h 0min

Calculated optimal time

CALCULATION RESULTS

0h 0min

Total Time

THC Retained

Efficiency (%/hr)

Quality Risk

WEIGHT LOSS ESTIMATION

0.00g

CO₂ Mass Lost

200.00g

Final Weight

0.00%

Weight Loss %

PROCESS BREAKDOWN

Base Reaction Time0h 0min

Heat-up Penalty0h 0min

Pressure Factor×

THCA→THC Conversion%

Quality/Terpene Risk%

PROCESS CURVE

EXPORT RESULTS

CO₂ PROTECTION

Mason jars with relief valves naturally create a protective CO₂ atmosphere. As THCA converts to THC, CO₂ is released, building pressure until the valve "burps" at 10 psi. This expelled gas is mostly CO₂, leaving minimal oxygen for THC oxidation.

THE CHEMISTRY

THC retention is 100% in low-oxygen environments at ≤110°C.

Relief valve jars achieve this through CO₂ displacement. After 2-3 "burps", O₂ levels drop to <0.1%, preventing THC→CBN conversion.

BEST PRACTICES

For optimal results, use lab-verified starting material potency, maintain consistent temperature throughout the process, and consider small test batches first.

Pro Tips

QUALITY PRESERVATION TIPS & TRICKS

EXTENDED TIME

Terpene Volatility

Even at 90-110°C, volatile terpenes slowly evaporate. A 24-hour hold bleeds these compounds into headspace.

Thermal Isomerization

Minor cannabinoids can slowly convert or degrade at 90°C over tens of hours.

OXYGEN EXPOSURE

Repeated Jar Burping

Each vent draws fresh air. Hourly venting over 12 hours accumulates O₂, driving THC→CBN conversion.

Micro-Leaks

Even "sealed" jars may have gasket leaks supporting slow oxidative degradation.

MOISTURE & PH

Residual Solvents/Water

Trace ethanol or moisture can hydrolyze compounds during long heating.

pH Shifts

Acidic residues can catalyze unwanted side-reactions over extended heat holds.

UNEVEN HEATING

Thermal Gradients

In thick, un-agitated masses, cores run cooler while walls run hotter creating inconsistent results.

External Heat Sources

Uneven stir-plate contact can exacerbate hot/cold regions. Frequent stirring minimizes this.

UV & LIGHT

Transparent Lids

Clear jar lids under bright shop lights can photo-degrade THC during multi-hour runs.

Prevention

Use opaque insulation or a dark enclosure to eliminate photo-degradation risk.

KEY TAKEAWAY

Quality degradation is cumulative. Each factor alone may seem minor, but combined over extended runs, they significantly impact your final product. Monitor and minimize all risk factors for optimal results.

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