How Much THC is in a Joint?

September 03, 2020
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How Much THC is in a Joint?

how much thc is in a joint

Just how much THC is actually in your joint? This is the question that many stoners – perhaps you included! – are beginning to ask, so they can have more influence over how high they are getting.

The amount of THC in a joint depends on multiple factors. These include how potent the cannabis is (i.e. how much THC there is) and how big the joint is. Furthermore, the impact of the high is also influenced by the amount of CBD, a non-psychoactive cannabinoids that, to some extent, suppresses the intoxicating effects of THC.

In this guide, we’ll give you a rough estimate as to how much THC is in a joint. We’ll also provide you with some simple mathematics tricks so you can work out how much THC is in any joint you may be smoking. And we’ll also teach you how to roll fatter joints, which pack in more marijuana for better highs.

How many grams of THC are in a joint?


Everybody rolls a joint slightly differently, and there’s no set amount for the quantity of marijuana – and therefore THC – in a joint. However, some researchers took it upon themselves a few years ago to work out the average amount of cannabis in an American joint. After collecting and crunching a ton of data, they came up with this figure: 0.32 grams, a smidgen under 1/3 of a gram.

If seems quite low to you, then be assured by the fact that the scientists were surprised as well. Of course, that’s just an average, and if you are rolling fat, pure joints then the cannabis and THC content will inevitably be much higher. But let’s work with the 1/3 of a gram statistic.

Imagine you’ve been to the dispensary, picked up some 12% THC cannabis, and are ready to roll one of those average American joints. Why 12%? That was the approximate THC level estimated by experts back in 2014. Given the array of high-strength pot sold in dispensaries nowadays, that average has perhaps increased in recent years.

This 12% figure means that 12% of the entire weight of the flower is comprised of THC. Therefore, every gram of 12% flower contains 120mg of THC. And since the average joint contains about 1/3 of a gram of cannabis, we estimate that the average joint contains about 40mg of THC, or 0.04 grams of THC.

Check out this table to get a close estimate of how much THC is in your joint, whatever the size, and however much THC you’re using!

Strength/size of joint 1/4 gram 1/3 gram 1/2 gram 2/3 gram 1 gram
5% THC 12.5mg THC 16.6mg THC 25mg THC 33.3mg THC 50mg THC
10% THC 25mg THC 33.3mg THC 50mg THC 66.6mg THC 100mg THC
15% THC 37.5mg THC 50mg THC 75mg THC 100mg THC 150mg THC
20% THC 50mg THC 66.6mg THC 100mg THC 133mg THC 200mg THC

How to correctly roll a joint to fit in more marijuana

So, you’re ready to learn how to roll better joints? Our first tip is to invest in a high-quality grinder that will grind up your bud as finely as possible. It’s much easier to work with finely-ground flower than slightly lumpy flower. We also recommend getting a small rolling table you can work on, to keep your weed-rolling operation tidy and organised!

Start off by breaking your cannabis down into small bits before placing it in the grinder. This will help achieve a smooth, and fine ground, which is exactly what you’re looking for. In the unfortunate event that you don’t have a grinder to hand, you can use scissors – although this really is a substitute method rather than a go-to one.

Next, you’ll need to make a crutch. You can use a cigarette filter although most people opt against this as it can negatively affect the potency of your joint. Just take some thin card – a business card will do the trick – fold it over “accordion” style a couple of times, before rolling it into a cylinder. Some companies that sell rolling papers conveniently include thin strips of card for making crutches. While you can get away without using a crutch, it helps make the joint more stable, and allows you to smoke the joint right down to the bottom, eliminating any wastage.

Now things start getting a little more fiddly – it’s time to actually fill your joint with cannabis. We suggest using hemp papers, as these are slightly sturdier than cigarette papers. Joints with these papers also burn more smoothly, and don’t contain any nasty flavors.

Place the crutch at one end of the joint, and fill the rest up with finely-ground flower. Make sure the flower is evenly distributed throughout the joint – this is essential for getting the perfect roll.

Pinch the paper with your fingertips and roll back and forth a few times to ensure the flower is tightly packed down into the joint. A tight packing is crucial, or the joint will burn quickly and unevenly, spoiling your experience. Once everything is perfect, tuck the unglued side of the paper into the roll, and gradually spin the joint through your fingers. Start licking the glued paper on the side where the crutch is, and begin tapering it down, working across the joint. Take your time with this step, as this will determine the quality of your joint.

Once you’ve glued the joint together, take a pencil and pack the weed down further into the joint. You may be able to sprinkle in a little more flower to make your joint bigger. Once you’re satisfied, twist the paper to seal the joint, and stop any flower from escaping!

Top tip: Use a four-piece grinder with a kief collector. Highly-potent kief is great for making your joints stronger, and can be sprinkled into the joint itself, or smeared onto the paper.

And that’s just about it! We hope this post has improved your understanding of cannabis joints!




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