Short answer
A half gram cart holds 500 mg of cannabis oil. Most users get 100 to 200 puffs from it. At 5 puffs a day, the cart lasts 20 to 40 days. At 25 puffs a day, it lasts 4 to 8 days. Puff size, battery voltage, and oil thickness set the count.
Puff math for a 500 mg cart
A 3 second draw at 3.0 to 3.3 volts moves about 2 to 3 mg of oil. Divide 500 mg by that range and you get 165 to 250 puffs. Real use adds waste from leaks, clogs, and priming puffs, so 100 to 200 usable puffs is a better working estimate.
Use per day and cart life
- 5 puffs a day: 20 to 40 days
- 10 puffs a day: 10 to 20 days
- 15 puffs a day: 7 to 13 days
- 25 puffs a day: 4 to 8 days
- 50 puffs a day: 2 to 4 days
What changes the numbers
- Voltage. A 2.5 volt battery makes small hits. A 4.0 volt battery burns more oil per draw.
- Draw length. A 2 second pull uses less oil than a 5 second pull.
- Oil thickness. Thin oil wicks faster and reaches the coil faster.
- Hardware. Ceramic coils and wide airflow move more oil.
- Waste. Leaks, clogs, and burnt coils remove oil you paid for.
- Tolerance. Users with high tolerance take more puffs per session.
Potency changes the dose, not the volume
Licensed carts test near 70% to 90% THC. A 500 mg cart at 80% THC holds about 400 mg of THC. One 3 second puff at low voltage delivers an estimated 1 to 3 mg of THC. No standard lab test measures THC per puff, so these figures come from device output and oil potency labels.
how long do disposable vape carts last
A 10 mg dose, the common serving cap for edibles in states with legal sales, takes 4 to 10 puffs at that rate. Users who track dose this way pull more oil per session than users who puff until they feel it.
Best Way to Make a Cart Last Longer: Low Heat Wins
Signs the cart is near empty
- Vapor gets thin and warm.
- Taste turns burnt or dry.
- Oil sits below the intake holes.
- The mouthpiece clogs with reclaim.
Stop at the burnt taste. Dry hits degrade the coil and waste the last of the oil.
Storage
Store carts upright in a cool, dark place. Heat thins oil and pushes it into the airway, where it leaks out. Light and air convert THC into CBN over months. A cart left in a hot car loses potency and oil.
Why convenience matters here
A cart needs no grinder, no paper, no flame. That lower effort raises use per day, and use per day sets the lifespan of 500 mg. A cart carried in a pocket sees more puffs than a jar of flower kept at home. Buyers who want a half gram cart to last a month should set a low voltage and track puffs.