A cannabis high from smoking or vaping typically lasts up to 6 hours, while edibles can keep you feeling effects for 6 to 8 hours. But the full answer depends on how you consume it, how much you use, and how often you use it. Here’s what to expect for each method and what “wearing off” actually looks like.
Smoking and Vaping: The Fastest, Shortest High
When you inhale cannabis, whether through a joint, pipe, bong, or vape, you feel effects within seconds to a few minutes. The high builds quickly and peaks around 30 minutes after your first inhale. From there, the main effects gradually taper over the next few hours, with the total experience lasting up to 6 hours.
Vaping tends to sit at the shorter end of that range. Some sources place the total duration of vaped cannabis at 1 to 3 hours, making it the fastest in-and-out option. Smoking generally lasts a bit longer because combustion delivers a broader mix of compounds alongside THC.
Edibles: Slower Onset, Much Longer Duration
Edibles follow a completely different timeline. They typically take 30 to 60 minutes to kick in, though some people wait up to 2 hours before feeling anything. Peak effects hit around 3 hours after you eat them. The total high commonly lasts 6 to 8 hours, and for some people, lingering effects stretch even longer.
The reason edibles hit harder and last longer comes down to how your liver processes THC. When you eat cannabis, your digestive system breaks down THC and your liver converts it into a more potent active form. This metabolite crosses into the brain more efficiently than THC itself. After smoking, relatively little of this conversion happens because THC enters your bloodstream through your lungs and largely bypasses the liver. After eating an edible, the ratio of this stronger metabolite to regular THC is significantly higher, which is why the experience feels more intense and drawn out.
This is also why edibles are easier to overconsume. The delayed onset tempts people to take a second dose before the first one kicks in, stacking effects that can become overwhelming hours later.
Tinctures and Other Methods
Tinctures held under the tongue (sublingual use) fall between vaping and edibles. Effects start in 15 to 45 minutes, build over 30 to 90 minutes, and the full experience lasts 3 to 6 hours. If you swallow a tincture or mix it into food or a drink, the timeline shifts to match edibles: 30 to 120 minutes for onset and 4 to 8 hours total.
A quick comparison of all three methods:
- Vaping or smoking: effects in seconds to minutes, peak at 30 minutes, total duration up to 6 hours
- Sublingual tinctures: effects in 15 to 45 minutes, peak at 30 to 90 minutes, total duration 3 to 6 hours
- Edibles: effects in 30 to 60+ minutes, peak around 3 hours, total duration 6 to 8 hours
What Affects How Long Your High Lasts
Two people can smoke the same joint and have noticeably different experiences. Several factors shift the timeline in either direction.
Tolerance: Regular users absorb more THC per session (bioavailability is roughly 23 to 27% for heavy users versus 10 to 14% for occasional users), but their brains have adapted to it. Infrequent users tend to feel effects more intensely and for longer from the same dose. Regular users also clear THC from their blood faster, at roughly 60 liters per hour compared to 36 liters per hour for newer users.
Dose and potency: More THC means a longer, stronger high. A 5 mg edible and a 50 mg edible are not the same experience in any way. The same applies to flower: strains testing at 25% THC will produce a more extended effect than those at 12%.
Body composition: THC is fat-soluble, meaning it gets stored in body fat and released slowly over time. People with higher body fat percentages may experience subtly prolonged effects and retain THC metabolites longer. Sex plays a role too: men clear THC from plasma slightly faster than women on average.
Food intake: Eating an edible on an empty stomach can speed up absorption, while a full meal may delay the onset but extend the duration.
Residual Effects the Next Day
Even after the high feels like it’s gone, some cognitive effects can linger. Research has documented measurable impairments in memory, reaction time, and divided attention up to 10 to 12 hours after use. In one study, participants showed slower recall of words and digits and increased reaction times a full 10 hours after consuming THC.
Evidence of impairment beyond 12 hours is limited. Only two studies, both using flight simulators, found measurable effects at 24 hours. Pilots showed increased deviation and less precise landings a full day after using cannabis with a 20 mg THC dose. For most people and most tasks, the residual fog clears within 12 hours, but complex or safety-sensitive activities may be affected longer than you’d expect.
How Long THC Stays Detectable
This is the question behind the question for many readers: the high is one thing, but how long does THC show up on a test? The answer is far longer than the effects last.
THC’s half-life in the body is about 1.3 days for infrequent users and 5 to 13 days for frequent users. Because THC and its byproducts accumulate in fat tissue and release slowly, urine tests can detect cannabis use for days to weeks depending on your usage pattern. A single use might clear in 3 to 4 days. Daily use over weeks or months can produce positive urine results for 30 days or more after stopping.
The key point: feeling sober and testing clean are two very different timelines. The psychoactive effects wear off in hours, but the chemical evidence lingers for days or weeks.
How Long Driving Impairment Lasts
Motor skill impairment from cannabis, including slower reaction times and reduced coordination, can last up to 3.5 hours after use. That’s the window where research consistently shows measurable effects on driving-related tasks. But given the residual cognitive effects described above, particularly with attention and reaction time, a wider safety margin is reasonable, especially after higher doses or edibles.