You can bring liquids in containers of 3.4 ounces (100 milliliters) or less each in your carry-on luggage on a plane. All these containers must fit within one clear, resealable quart-sized (about 32 ounces) plastic bag, and you are limited to one such bag per passenger. This is commonly known as the TSA 3-1-1 rule (3.4 oz per container, 1 quart bag, 1 bag per passenger)
. In terms of total volume, you can carry roughly about 25 to 27 ounces of liquids if you fill the quart bag with multiple 3.4-ounce containers, but the key is that all containers fit comfortably inside the single bag and the bag can be sealed
. There are exceptions to this rule for medically necessary liquids, baby formula, breast milk, and duty-free liquids purchased after security, which can exceed the 3.4-ounce limit but may require declaration and additional screening
. Summary:
- Maximum per container: 3.4 ounces (100 ml)
- All containers must fit in one quart-sized clear plastic bag
- One bag per passenger
- Total liquid volume approximately 25-27 ounces depending on container sizes
- Exceptions for medications, baby food, breast milk, and duty-free purchases
This applies to carry-on luggage; larger containers can be packed in checked baggage without this restriction
