A 1 gram THC cart lasts about one to three weeks for a daily user. Hit it a few times a day and one can stretch past a month. Rip it from morning to night with a high tolerance and a gram is gone in under a week. The variable that matters is how much THC leaves the cart per puff, and that number swings a lot from person to person.
Start with what is actually in the cart
A 1 gram cart holds 1,000 mg of oil. In a typical distillate or live resin cart, THC makes up 70 to 90 percent of that oil, which works out to roughly 700 to 900 mg of THC. Compare that to a half-gram joint of 20 percent flower, which carries about 100 mg of THC before you account for what burns off between puffs. The cart is a concentrated supply, and it lasts as long as your daily intake allows.
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- Oil volume: 1,000 mg
- THC content: about 700 to 900 mg
- THC per puff at 3 to 3.5 volts with a two to three second draw: about 1.5 to 3 mg
- Puffs per cart: roughly 250 to 400
Those per-puff numbers come from device testing, not from a label. Voltage, draw length, coil age, and how much oil is soaked into the wick all shift the dose.
How long that translates to by habit
- Light use, three to five puffs a day: 60 to 100 days of oil, though flavor and wicking usually fall off before the cart empties.
- Moderate use, 10 to 15 puffs a day: about three to four weeks.
- Heavy daily use, 25 to 40 puffs a day: one to two weeks.
- High-tolerance all-day use, 60 puffs and up: three to five days.
Why carts run out faster than the arithmetic predicts
Convenience is the product. That same convenience is what drains the cart. A joint announces itself: you roll it, you step outside, you finish it, you are done. A cart sits in your pocket with no beginning and no end. Every bit of friction you removed, the grinder, the smell, the lighter, the walk outside, was also a natural brake on how often you used. Take the brakes off and puff count climbs.
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- High voltage burns more oil per hit and can scorch the coil, which makes later hits taste burnt and feel weaker, so you hit more.
- High-potency oil builds tolerance, and tolerance raises your baseline puff count.
- Clogs and leaks waste oil you paid for. So does oil left coating the walls and wick when the cart stops producing.
- Chain hitting does not let the wick refill, so oil burns dry and the cart dies early.
Stretching a 1 gram cart
- Run the battery low, around 2.5 to 3.2 volts.
- Take two to three second draws with a pause between them.
- Count your puffs for two days. Most people guess low by half.
- Store it upright in a cool, dark place. Heat thins the oil and invites leaks; cold makes it too thick to wick.
- Keep a spare battery charged so you are not compensating with long, hot hits on a weak one.
Does the cart ever last longer than expected?
Sometimes. A fresh cart used at low voltage by someone with a low tolerance can sit around for months. What usually ends its life first is not running dry but the tail end: the oil darkens, the flavor turns flat, the mouthpiece clogs, and the last few hundred milligrams become hard to reach. If you are an occasional user, a half gram cart is often the better buy because you will finish it while it still tastes right.
The convenience question
If you are asking how long a 1 gram cart lasts, you are probably also asking how much you are using. The cart makes the answer harder to see, because there is no ash, no roach, no obvious endpoint. The number to watch is puffs per day. Track it for a week, multiply by 2 to 3 mg of THC, and you will know both how long your next cart will last and whether the convenience is costing you more than you planned.