Does Weed Have Calories?

Counting calories and smoking weed rarely come up in the same conversation, until the munchies hit. Then the question gets practical: how much of tonight's intake came from the plant itself, and how much from the brownie, the gummies and the chips?

The answer is reassuring for flower and less so for edibles. Smoked or vaped cannabis adds almost nothing to the day's total, while infused food carries every calorie of the butter, sugar and flour it was made with.

Key takeaways

• A joint adds no calories worth counting, because smoke is inhaled, not digested.
• Even if the body burned THC like fat, a 10 mg dose would add less than a tenth of a calorie.
• Edibles carry the calories of their base, so a tablespoon of cannabutter holds about 100 calories.
• Cannabinoids can switch on hunger even in mice that are already full, a 2015 study found.
• People who used cannabis gained less weight over three years than people who never did, in a study of about 33,000 adults.
• The THC drug dronabinol is prescribed for appetite loss and weight loss in people with AIDS.

The plant itself

People ask, "Does weed have calories?" mostly because they want to know whether a nightly joint shows up on the scale. Dried flower is plant matter, mostly fiber with a coat of resin, and none of it reaches the stomach when it is smoked or vaped. The body counts calories only when the gut absorbs food, so the calories in weed you inhale are, for practical purposes, zero.

THC itself is a tiny amount of an oily molecule. Even if the body burned it like fat, which carries about 9 calories per gram, a 10 mg dose would supply less than a tenth of a calorie, a fraction of what a single breath mint holds. The terpenes and other cannabinoids in resin come in milligram amounts, too small to change anything on a food label. Hemp seeds are a different matter, since they are a real food with protein and fat, but they carry virtually no THC and play no part in a high.

Joints, vapes and tinctures

Rolling paper is thin plant fiber that burns along with the flower, and a vape cartridge delivers oil as vapor to the lungs, not the gut, so neither adds calories in a joint or a puff. Even someone who smokes several grams a day takes in no meaningful energy from the smoke itself. Tinctures show how small the numbers get. A 1 mL dropper of high-proof alcohol tincture holds about 0.75 grams of ethanol, roughly 5 calories at 7 calories per gram, and a glycerin tincture lands in the same range. Edibles are a different story:

Edibles carry the recipe's calories

Calories in edibles have nothing to do with THC and everything to do with the food carrying it. Infused butter and oil are almost pure fat, so a tablespoon of cannabutter carries about 100 calories and a tablespoon of infused olive oil about 120, in line with USDA nutrition data for the plain versions. A gummy is mostly sugar, and a brownie brings butter, sugar and flour together.

The dose and the calories move separately. A strong 10 mg gummy and a mild 2 mg gummy can carry exactly the same calories, while a weak brownie that takes three pieces to feel means three brownies' worth of energy. Infused drinks range widely, from zero-sugar seltzers to sweet lemonades, so the label matters more than the THC number. Whatever the format, wait at least two hours before eating more, since a late kick often turns into a second round of snacks.

The unexamined day is a wasted opportunity. Reflect on what you did, what you learned, and how you can improve.

John Dewey

Munchies and the brain

The real calorie story is the munchies, and it starts in the hypothalamus. A 2015 study published in Nature looked at POMC neurons, brain cells that normally help signal fullness, and found that cannabinoids flip them toward pushing food intake instead. The Jackson Laboratory, which supplied the mice, explained that activating cannabinoid receptors can stimulate feeding in mice even in a state of satiety. In plain terms, a full stomach stops being a reliable brake, which is why the munchies can strike an hour after a big dinner.

Hormones shift, too. In a 2020 study in Translational Psychiatry, 20 regular users took oral, smoked or vaporized cannabis or a placebo across four sessions. Insulin jumped after a brownie in the placebo session, and that spike was blunted by cannabis administration, while total ghrelin, a hunger hormone, ran higher in the oral session than in the smoked and vaped ones. The authors concluded that cannabis changed several appetite and metabolism hormones, chiefly insulin.

Weed and diet in the research

The surprise is that heavy munchies do not seem to translate into heavier users. A Michigan State University team followed about 33,000 adults for three years and found that everyone gained some weight, but those who used marijuana had less of an increase than people who never used. The gap was modest, about 2 pounds for a 5-foot-7 adult starting near 200 pounds, and only 15% of persistent users were considered obese, compared with 20% of non-users. The researchers stressed that cannabis should not be treated as a diet aid, and the debate over whether weed can actually help with weight loss is far from settled.

Medicine uses the appetite effect on purpose. Dronabinol, a synthetic THC capsule, is prescribed to treat loss of appetite and weight loss in people with AIDS, as well as nausea and vomiting from chemotherapy. For most people thinking about weed and diet, though, the number that matters is the snacks, not the smoke.

Dessert strains with no calories

Some of the sweetest flavors in our catalog come with no calories at all, since the dessert lives in the terpenes, not in sugar:

• Wedding Cake, a Cherry Pie, Girl Scout Cookies and OG Kush cross at 27% THC, smells of sweet vanilla over earthy notes and brings relaxing, mood-stabilizing effects after 55 to 60 days of flowering.
• Biscotti, a Gelato, Girl Scout Cookies and OG Kush cross at 29% THC, tastes of creamy sweet cookies and sugary vanilla with a diesel edge and settles into a deeply relaxing body stone.

Both lean 80% indica, which suits an evening session after dinner rather than a busy afternoon.

Keeping the munchies in check

Cravings are easier to steer than to fight, and a few swaps keep the crunch and the sweetness while cutting the total:

A few habits help, too:

• Set out snacks before the session, so the first thing within reach is a planned choice.
• Drink water, since a dry mouth can feel a lot like a craving.
• Pour snacks into a bowl instead of eating straight from the bag.
• Keep sweet drinks for the end of the night, not the start.
• Brush your teeth after the session, an old trick that tells the brain the kitchen is closed.

Count the snacks, not the smoke

Weed has no calories worth counting when it is smoked or vaped, and even the THC in an edible adds next to nothing. The calories in edibles come from butter, oil and sugar, and the bigger factor is the munchies, which push the brain toward food even when the stomach is full. For anyone tracking weed and diet, the snack bowl matters far more than the joint.

Barney's Farm has been developing premium cannabis genetics since the 1980s, with over 40 Cannabis Cup wins. Explore our full seed catalog and find strains bred for every climate and skill level.