You can bring toothpaste on a plane in your carry‑on as long as each tube is no larger than 3.4 ounces (100 milliliters), and it fits inside your single quart-sized clear liquids bag with your other liquids and gels.

The Quick Scoop

  • Maximum size in carry‑on: 3.4 oz / 100 ml per toothpaste tube.
  • It’s the size of the container that matters, not how much is left inside (a half‑empty big tube can still be taken away).
  • All your liquid toiletries (including toothpaste) must fit together in one quart-sized, clear, resealable bag.
  • Larger “full‑size” tubes (often ~6 oz) must go in checked baggage or they’ll likely be confiscated at security.

Carry-on vs. Checked Bag

  • Carry-on:
    • Toothpaste is treated as a liquid/gel.
* Each tube must be 3.4 oz / 100 ml or less and fit in your liquids bag.
  • Checked bag:
    • You can pack larger, full‑size toothpaste tubes with no specific size limit.
* Still a good idea to seal them in a plastic bag to avoid leaks.

Example

If you bring:

  1. One 6 oz tube, half empty → Not allowed in carry‑on, must be checked.
  1. Two 1.5 oz travel tubes → Both allowed in carry‑on, as long as they fit in your quart bag.

Little Extras and Tips

  • Travel-size tubes around 1–2 oz are ideal for short trips and easily meet the rules.
  • You can bring multiple small tubes in carry‑on as long as they all fit inside that one quart bag.
  • Solid toothpaste options (like tablets) are often treated differently and typically aren’t limited by the 3.4 oz liquid rule.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.