500mg vs 1000mg Vape Cartridges: What’s the Difference?

Choosing between a 500mg and a 1000mg vape cartridge comes down to two questions: do you already know you like the oil or strain, and what does each size cost for the amount of oil you get? A 500mg cartridge is the smaller commitment. A 1000mg cartridge contains twice the stated oil weight and can cost less per milligram of oil. Neither label tells you, by itself, how many milligrams of THC are in the cartridge.

Here is the short answer: if you are comparing LiT’s standard $29 500mg and $39 1000mg cartridges in the same eligible strain, the 1000mg option costs $0.039 per stated milligram of oil, versus $0.058 for the 500mg option. That is about 33% less per milligram of oil. Prices and available variants can differ, so check both selections before comparing them.

500mg vs 1000mg at a glance

*Examples use the standard listed starting prices on LiT’s product pages checked September 16, 2026. The live 500mg page lists $29–$39 and the 1000mg page lists $39–$49 across variants. The comparison assumes the same type of eligible strain at the starting price; a different selection can change the arithmetic. This is cost per stated milligram of oil, not cost per milligram of THC.

You can see the current selections on the LiT 500mg cartridge page and LiT 1000mg cartridge page. Compare the same strain and cannabinoid option whenever possible; otherwise you are comparing two different products as well as two sizes.

What do the 500mg and 1000mg labels measure?

On these LiT listings, the number describes the stated weight of cannabis oil in the cartridge. A 1000mg cartridge has twice the stated oil weight of a 500mg cartridge. The number is not a promise of exactly 1000mg of THC or exactly 500mg of THC.

To work out approximate THC content from oil weight, you also need the THC concentration for that specific product and, ideally, its current batch. For a purely mathematical example, if 500mg of oil were tested at 70% THC by mass, 500 × 0.70 would equal about 350mg of THC in that oil. If 1000mg of oil had the same tested concentration, it would contain about 700mg of THC. Those percentages and results are illustrations, not LiT lab results. A CBD-rich cartridge, a different strain, or a different batch might have a different cannabinoid profile.

That is why ‘twice the oil’ does not mean ‘twice as strong per puff.’ The size affects how much oil the cartridge holds. The cannabinoid concentration and the amount aerosolized and inhaled are separate questions. If a seller provides a batch-specific report, match its lot number to the package and read the cannabinoid values there. LiT’s product FAQ also explains the stated cartridge sizes.

Is the 1000mg cartridge actually better value?

At the standard starting prices shown above, yes, per stated milligram of oil. Here is the arithmetic without a mystery discount:

• One 500mg cartridge at $29: $29 ÷ 500 = $0.058 per mg of oil.
• One 1000mg cartridge at $39: $39 ÷ 1000 = $0.039 per mg of oil.
• Two 500mg cartridges at $29 each: $58 for 1000mg of stated oil. One 1000mg cartridge at $39 costs $19 less, provided you are comparing the same eligible option.

The larger cartridge is about 33% less expensive per milligram of oil at those two listed prices. It is not ‘half the price per mg’: $0.039 is about two-thirds of $0.058. If your chosen 500mg or 1000mg variation has a different price, divide that variation’s price by 500 or 1000 and repeat the comparison.

Value also depends on whether you want the same option for the entire cartridge. A lower cost per milligram does not help much if you buy a larger cartridge of a flavour or profile you do not enjoy. On the other hand, once you know what you prefer, paying more per milligram for several small cartridges may make little sense. Check the full refill-cartridge collection for the available sizes and variants.

When does a 500mg cartridge make more sense?

Choose the smaller size when you want to compare unfamiliar options without buying 1000mg of each one. It is also the lower-cost single-cartridge purchase at the standard starting prices. If you are buying several different strains, the smaller format lets you put less of your total purchase into any one choice.

Do not treat 500mg as a ‘beginner dose.’ It is the amount of oil in the container, not an amount to inhale at once. A first-time user still needs to read the actual cannabinoid information and follow product directions. LiT’s first vape pen guide explains the difference between a separate cartridge, a kit, and a disposable pen. A cartridge needs a compatible battery regardless of whether the cartridge says 500mg or 1000mg.

When does a 1000mg cartridge make more sense?

It is the straightforward choice to compare when you already know you want more of a particular option. At the listed standard starting prices, it gives you twice the stated oil weight for $10 more than one 500mg cartridge. The value calculation is strongest when the strain and cannabinoid option you want is available in both sizes.

A larger cartridge does not guarantee a particular number of sessions or puffs. Draw length, device settings, frequency of use, and the product itself all affect how long one lasts. A bigger container also does not prove that the oil is more potent. Look at cannabinoid information for that selection rather than inferring potency from cartridge size.

Compare the same product, not just the same label

There are four checks worth doing before using any size comparison to decide:

1. Same cannabinoid option: A THC-focused option and a CBD-rich option may have different prices and different test results.
2. Same strain or flavour: Check that the option you want is offered in both sizes.
3. Actual variation price: Product pages can show a range. The price of the selected variation is the number to use in your calculation.
4. Battery compatibility: Both are cartridges, rather than complete pens. LiT lists its cartridges as 510-thread compatible; follow the device and cartridge manufacturers’ specifications before use.

If you do not have a battery, compare the reusable vape pen kits as a separate purchase. A kit’s price includes hardware, so dividing its entire price by the cartridge’s oil weight would not be an apples-to-apples comparison with a refill cartridge.

Common questions

Does 1000mg mean 1000mg of THC?

No. On LiT’s listings, 1000mg describes stated oil weight. THC content depends on the oil’s tested cannabinoid concentration. Read the product’s cannabinoid information rather than using the cartridge-size number as a THC figure.

Is a 1000mg vape cartridge twice as strong as a 500mg cartridge?

Not necessarily. It has twice the stated amount of oil, but concentration can vary between products or batches. ‘More oil in the cartridge’ and ‘higher concentration in the oil’ mean different things.

Do both cartridge sizes fit the same kind of battery?

LiT lists both refill sizes for 510-thread batteries. Physical fit alone does not establish ideal device settings, so check the instructions for the battery and the particular cartridge. The hardware FAQ is a useful starting point.

Why do the product pages show price ranges?

Some selections are priced differently. Our $29 versus $39 calculation uses the standard starting prices visible on September 16, 2026. Select the same available option in both sizes and use those live prices for a personal comparison.

The decision in one sentence

A 500mg cartridge gives you less of an unfamiliar option for a lower single-cartridge price; a 1000mg cartridge gives you more oil at a lower cost per stated milligram when the same eligible option is compared at LiT’s standard starting prices. Check the actual cannabinoid information separately, because neither size label tells you how much THC is in the oil.