1. What is THCA to THC Conversion?

THCA (Tetrahydrocannabinolic acid) is the non-psychoactive acidic precursor to THC (Tetrahydrocannabinol). When heated (decarboxylated), THCA converts to THC with approximately 87.7% efficiency.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

Where:

• \( THCA \) — Amount of THCA in milligrams
• \( 0.877 \) — Conversion efficiency factor

Explanation: The 0.877 factor accounts for the molecular weight difference when THCA loses a carboxyl group (CO₂) during decarboxylation.

3. Importance of THC Calculation

Details: Accurate THC calculation is crucial for dosing cannabis products, ensuring proper potency for medical use, and complying with legal THC limits.

4. Using the Calculator

Tips: Enter the THCA content in milligrams. The calculator will show the equivalent THC amount after decarboxylation.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 0.877?
A: This accounts for the molecular weight difference when THCA loses a carboxyl group during decarboxylation (314.5 g/mol THCA → 287.5 g/mol THC).

Q2: Does this account for 100% decarboxylation?
A: The 0.877 factor is theoretical maximum. Actual conversion may be slightly less due to imperfect decarboxylation.

Q3: How does this apply to edibles?
A: When making edibles, use this calculation to estimate final THC content after proper decarboxylation of THCA.

Q4: What about other cannabinoid acids?
A: Similar conversions apply (e.g., CBDA to CBD uses 0.877), but this calculator only handles THCA to THC.

Q5: Does this work for lab test results?
A: Yes, this is the standard calculation used when labs report "Total THC" (THC + (THCA × 0.877)).