1. What is the THC Elimination Equation?

The THC elimination equation estimates the remaining concentration of THC metabolites in urine based on initial concentration, time elapsed, and the half-life of THC metabolites. This helps determine how long THC remains detectable in urine.

2. How Does the Calculator Work?

The calculator uses the THC elimination equation:

Where:

• \( Initial \) — Initial THC concentration (ng/ml)
• \( t \) — Time elapsed (days)
• \( HL \) — Half-life of THC metabolites (days)

Explanation: The equation models the exponential decay of THC metabolites in urine based on their known half-life.

3. Importance of THC Concentration Calculation

Details: Understanding THC elimination helps estimate detection windows for drug tests and assess how long THC remains in the system after use.

4. Using the Calculator

Tips: Enter initial THC concentration in ng/ml, time elapsed in days, and metabolite half-life in days. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical half-life of THC metabolites?
A: The average half-life is about 3-5 days for occasional users and 5-13 days for chronic users.

Q2: What concentration is considered positive on drug tests?
A: Most standard urine tests use a cutoff of 50 ng/ml, with confirmatory tests at 15 ng/ml.

Q3: How accurate is this calculation?
A: It provides an estimate but actual elimination varies based on metabolism, body fat, hydration, and other factors.

Q4: Can this predict when I'll test negative?
A: It can estimate when concentration might fall below test thresholds, but individual results may vary.

Q5: Does this account for multiple uses?
A: No, this calculates for a single use. Chronic use leads to accumulation and longer detection times.