The limits
Adults 21 and older may possess up to 2.5 ounces (70.875 g) of usable cannabis, or up to 1/4 ounce of concentrated cannabis or cannabis products containing not more than 7,087 mg of THC, or a combination that does not exceed the legal limit.
Stores may not sell more than that amount in a single transaction.
Mixing flower and other products
The CCB publishes an equivalency chart. For example, according to that chart, 1 ounce of flower plus up to 4,255 mg THC in other products is within the limit, and 2.5 ounces of flower leaves 0 mg for other products.
Older limits you may see online
Many travel sites still quote the old 1 ounce / 1/8 ounce limits. Those changed on January 1, 2024. Use the CCB numbers above.
Questions
What is the possession limit in Las Vegas?
2.5 ounces of usable cannabis or 1/4 ounce of concentrate (7,087 mg THC), or an equivalent combination, for adults 21+ (NRS 678D.200; CCB).
Did the limit change?
Yes. Senate Bill 277 raised it effective January 1, 2024.