Cannabis · Dosing
THC percentage on a label tells you almost nothing about what your experience will be. Here's what actually matters.
The Basics
The cannabis industry has conditioned people to shop by THC percentage. Higher number = stronger = better. None of that holds up. THC percentage on a label is an approximation of dried flower tested before packaging — it doesn't account for how you consume it, your individual endocannabinoid system, tolerance, terpene content, or lab testing variance.
The only reliable way to find your dose is to start low, go slow, and keep notes. One hit. Wait 15 minutes. Assess. Repeat if needed. This is especially true returning after a break.
The wet vs dry testing problem
Most labs test cannabis before it's fully dried and cured. Moisture content affects THC readings significantly. A flower testing at 28% wet might be 22-24% dry. Labels are approximations, not guarantees. Two products with the same label can feel completely different.
The realistic ceiling
Research suggests most people don't notice meaningful difference above 25-30% THC in flower. The marginal return diminishes fast — and high-THC products are more likely to produce anxiety in sensitive individuals. More is not always better.
Individual variation
Your endocannabinoid system is unique. Genetics, CB1 receptor density, tolerance, metabolism, and even diet affect how cannabis hits you. What works for your friend may not work for you — and that's not a flaw, it's biology.
Set, setting, and expectations
Your mental state going in shapes the experience significantly. Anxious before you start? Cannabis often amplifies that. Relaxed and comfortable? Same dose hits differently. These aren't soft factors — they're pharmacologically real.
Dosing Calculator
This isn't a precise prescription — it's a starting point based on your experience, method, and intention. Always start at the lower end and adjust from there.
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Your starting point
Why there's no weight input
Cannabis is fat-soluble, not water-soluble. Body weight doesn't predict dose the way it does for alcohol or many medications. Your endocannabinoid system density, tolerance, and individual metabolism matter far more. Adding weight to this calculator would imply a false precision that doesn't exist.
Edibles — A Different Animal
When THC is digested rather than inhaled, your liver converts it to 11-hydroxy-THC — a metabolite that is more potent and significantly longer-lasting than inhaled THC. This is why edibles hit differently, not just stronger. The experience is qualitatively distinct.
Onset and duration
Onset is 30 minutes to 2 hours depending on your metabolism and stomach contents. Duration is 4–8 hours. Plan your day accordingly. The most common mistake: "I don't feel anything" at 45 minutes → take more → feel way too much at 90 minutes.
Starting doses
2.5mg for new or sensitive users. 5mg for most people as a genuine starting dose. 10mg is a strong dose for most adults regardless of flower experience. Commercial products labeled 10mg as "one serving" are often too high for first-timers.
The two-hour rule — no exceptions
Wait a full two hours before deciding an edible hasn't worked. Stomach contents, individual metabolism, and product type all affect onset. Redosing at 45 minutes because "nothing is happening" is the most reliable way to have a bad time.
Tim's Take
You can always take more, never less — and that's the whole philosophy in one sentence. I've watched people ruin a perfectly good evening by rushing an edible because it wasn't hitting fast enough. Patience is the most underrated skill in this space. Whether it's flower, an edible, or a dab, give the substance time to do what it's going to do before you decide it isn't working. First time with edibles especially: take half. Wait an hour. Then decide. The bag will still be there.
THC % is an approximation. Two products with the same number can feel completely different.
Start with one hit or one piece. Wait. Assess. You can always take more, never less.
Edibles: 2.5–5mg starting dose, wait two full hours before deciding to take more.
Your body weight doesn't predict your dose. Your endocannabinoid system does.
More than 25-30% THC in flower rarely means a meaningfully stronger experience.
Anxiety sensitivity? Start lower, prioritize balanced THC:CBD ratios.