When flying, the TSA liquid rule for carry-on bags allows passengers to bring liquids, aerosols, gels, creams, and pastes in containers of 3.4 ounces (100 milliliters) or less each. All these containers must fit comfortably within a single quart-sized (approximately 32 ounces) clear, resealable plastic bag. Each passenger is limited to only one such bag
. In practical terms, this means you can carry about seven to eight containers of 3.4 ounces each, totaling roughly 25 fluid ounces, depending on how well they fit in the quart bag
. There are important exceptions to this rule for medically necessary liquids, baby formula, breast milk, and duty-free liquids purchased after security. These items can exceed the 3.4-ounce limit but must be declared and presented separately at security screening
. For checked baggage, there are no TSA liquid restrictions, so you can carry larger quantities of liquids there, but it is recommended to pack them carefully to avoid leaks
. In summary:
- Maximum container size for carry-on liquids: 3.4 ounces (100 ml)
- Total liquids must fit in one quart-sized clear bag
- Approximately 25 fluid ounces total in carry-on liquids if using 3.4-ounce containers
- Exceptions exist for medications, baby products, and duty-free liquids
- No liquid limits for checked baggage
This 3.4-ounce limit aligns with international regulations, including those in Europe, where the maximum carry-on liquid size is also 100 ml (about 3.38 US fluid ounces)
. This is commonly known as the TSA 3-1-1 liquids rule: 3.4 ounces per container, 1 quart-sized bag, 1 bag per passenger
