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A smoked high usually lasts 2 to 4 hours. A vape high is often slightly shorter, around 1 to 3 hours. An edible high lasts 4 to 8 hours, sometimes longer. The method of consumption matters far more than the strain. Joint or bong - Onset: within 1 to 5 minutes - Peak: around 20 to 30 minutes - Main effects fade: 2 to 4 hours - Subtle after-effects (tiredness, slower reactions): up to 6 hours Because the onset is fast, smoking is the easiest method to control. Take a few puffs, wait 15 minutes, decide. Vaporiser - Onset: 1 to 5 minutes - Peak: 15 to 30 minutes - Duration: 1 to 3 hours Vaporised THC hits similarly fast but often feels cleaner and shorter, which makes it easy to underestimate how much you have taken. Edibles - Onset: 30 to 120 minutes - Peak: 2 to 4 hours - Duration: 4 to 8 hours, up to 12 on a high dose The long delay is the single biggest cause of bad experiences. If nothing is happening after 45 minutes, that is normal. Do not take more before two hours have passed. What makes it longer or shorter - Dose: more THC means both a stronger and a longer high. - Tolerance: regular use shortens the subjective high. - Body and metabolism: an empty stomach speeds up edibles; food slows them. - Mixing with alcohol lengthens and intensifies the effect unpredictably. If it is too much It is uncomfortable but not dangerous. Sit or lie down somewhere quiet, drink water, eat something light, breathe slowly, and remind yourself that it will pass. Cold water on the face and a calm friend both help. Time is the only real cure. Planning around it If you need to be functional, count backwards: a joint in the evening is mostly gone in 3 hours, an edible is not. The Joint Calculator estimates a dose for the intensity you actually want, which is the easiest way to keep the evening the length you planned.

A typical joint contains 45 to 75 mg of THC on paper, but you only absorb roughly 10 to 20 mg of it. That gap is the reason two people can smoke the same joint and have completely different evenings. The simple formula grams x THC percentage x 1000 = mg of THC in the joint. Example: 0.35 g at 20% THC = 0.35 x 0.20 x 1000 = 70 mg of THC in the material. Why you do not get 70 mg Burning a joint is inefficient. Part of the THC is destroyed by the heat, part of the smoke burns away between puffs, and part is exhaled. Research on inhaled cannabis puts bioavailability somewhere around 10% to 35% depending on how deeply and how often you inhale. Using a realistic 25%, that 70 mg joint delivers about 17 mg of absorbed THC. What that means in practice - One puff of a standard joint delivers roughly 1 to 3 mg of absorbed THC. - A light effect for an occasional user starts around 2 to 5 mg. - 10 mg absorbed is already a strong experience for someone with low tolerance. - Daily users often need 20 mg or more to feel the same thing, which is tolerance, not strength. Edibles are a different world Swallowed THC passes through the liver and is converted into a more potent compound, with a delay of 30 to 120 minutes. This is why 10 mg in a gummy can feel far stronger and longer than 10 mg inhaled, and why "I did not feel anything, I will take another" is the classic mistake. How to use the number Knowing the mg turns guesswork into a decision. Check the THC percentage on the label or ask your supplier, weigh what you roll once, and you can estimate every joint from then on. The Joint Calculator does this maths for you, including your tolerance and the intensity you want, and gives you a gram amount to roll.

Most joints contain between 0.3 g and 0.5 g of cannabis flower. Studies of self-reported use put the average joint at roughly 0.32 g, while pre-rolls sold in dispensaries are usually filled to 0.5 g or 1 g because those are convenient packaging sizes, not because that is a sensible single dose. Typical sizes - Small / solo joint: 0.2 to 0.3 g - Standard joint: 0.3 to 0.5 g - Shared or "party" joint: 0.7 to 1 g - King-size pre-roll: 1 g and up From grams to THC Grams only tell you how much plant material is burning. What matters for the effect is how much THC that plant material contains, and how much of it actually reaches you. Modern flower commonly tests between 15% and 25% THC. A 0.3 g joint at 20% THC holds about 60 mg of THC on paper, but combustion destroys a large share of it and much of the smoke is lost to the air. Realistically only around 20% to 30% is absorbed, which puts a typical solo joint in the range of 10 to 20 mg of absorbed THC. How much should you put in? If you are new, rolling less is the single easiest safety measure. A 0.2 g joint smoked slowly, with a pause of 10 to 15 minutes after a few puffs, lets you feel where you are before you go further. Effects from smoking appear within minutes and peak around 30 minutes, so waiting costs you nothing and protects you from an uncomfortable evening. Practical tips - Weigh once with a cheap scale, then you will recognise the amount by eye. - Sharing a joint splits the dose; a 0.5 g joint between two people is roughly 0.25 g each. - Stronger flower means a smaller joint, not the same joint. - A joint you do not finish is not wasted; put it out and keep it. You can put your own numbers, strength and tolerance into the Joint Calculator on the home page and it will suggest a gram amount instead of you guessing.