Toothpaste is allowed through TSA security, but only in carry-on bags and only if the tube is 3.4 ounces or smaller

You can bring toothpaste in your carry-on bag as long as it follows the TSA's 3-1-1 rule for liquids and gels. A standard toothpaste tube is usually 2.7 to 6 ounces, so check the label on yours. If your tube is 3.4 ounces or smaller, it passes through security. If it is larger, you must pack it in your checked baggage instead.

The 3-1-1 rule means: one quart-sized clear plastic bag, holding containers of 3.4 ounces or less each, one bag per passenger. Toothpaste counts as a gel under this rule, even though you think of it as a paste. TSA officers screen the bag separately at the checkpoint, so have it ready to remove before you reach the scanner.

Toothpaste in checked baggage has no size limit. If you are checking a large tube or a full-sized container, pack it in your checked bag instead and leave your carry-on slot for something else.

Key Takeaways

  • Toothpaste tubes of 3.4 ounces or smaller go in your carry-on bag inside a clear quart-sized plastic bag with other liquids and gels.
  • Tubes larger than 3.4 ounces must go in checked baggage, where there is no size limit.
  • Have your liquids bag ready to remove at security so the officer can screen it separately.
  • Solid toothpaste tablets and toothpaste powder are not subject to the liquid rule and can go in carry-on or checked bags without restriction.

How the 3-1-1 rule works for toothpaste

The TSA classifies toothpaste as a gel, which falls under the liquid rule. You need one clear quart-sized plastic bag (roughly 7 inches by 8 inches) to hold all your liquids and gels combined. Each individual container—your toothpaste tube, shampoo bottle, lotion jar—must be 3.4 ounces or smaller. The total volume of all containers together cannot exceed one quart.

Most travel-size toothpaste tubes are already 3.4 ounces or less, so they fit the rule without any work on your part. Full-size tubes from your bathroom are often 5 or 6 ounces, which means they do not fit. Buy a travel tube before your trip, or pack your regular tube in checked baggage.

You can bring multiple toothpaste tubes in your liquids bag as long as each one is 3.4 ounces or smaller and they all fit inside the quart-sized bag. There is no rule against packing two or three small tubes together.

What happens if your toothpaste is too large

If your toothpaste tube is larger than 3.4 ounces and you try to bring it through security in your carry-on, the TSA officer will confiscate it. You cannot negotiate or ask for an exception—the rule is the same for everyone. The tube will be thrown away, not returned to you.

To avoid losing toothpaste you paid for, check the size before you pack. If your tube is over 3.4 ounces, move it to your checked bag. If you do not have a checked bag, buy a travel-size tube at the airport after security, or wait until you reach your destination to use your full-size tube.

Toothpaste alternatives that skip the liquid rule

If you want to avoid the 3-1-1 rule altogether, consider solid toothpaste tablets or toothpaste powder. These are not classified as liquids or gels, so they are not subject to the 3.4-ounce limit. You can pack them in any size in your carry-on bag, and they take up less space than a tube.

Toothpaste tablets dissolve in your mouth or in a small amount of water. Toothpaste powder works like regular toothpaste when you wet your toothbrush. Both are sold at drugstores and online. If you travel frequently, switching to one of these formats removes the hassle of measuring and packing a liquids bag.

Packing your toothpaste for the checkpoint

Place your toothpaste tube in your clear quart-sized plastic bag along with other liquids and gels: shampoo, conditioner, lotion, sunscreen, deodorant, and any other gel or liquid toiletry. Seal the bag. When you reach the security checkpoint, remove the bag from your carry-on and place it in the bin with your shoes and electronics so the officer can scan it separately.

Do not open your toothpaste tube or squeeze it to test whether it leaks. A tube that leaks during screening can damage other items in your bag and may result in confiscation. If you are worried about leakage, wrap the cap with plastic wrap or place the tube in a small zip-top bag inside your liquids bag.

International flights and toothpaste rules

The 3-1-1 rule applies to flights departing from the United States. If you are flying internationally, the country you are flying to may have different rules. Most European and Canadian airports follow the same 100-milliliter (3.4-ounce) limit, but some countries have stricter or looser rules.

Check the security rules for your destination airport before you pack. If you are connecting through another country, follow the strictest rule that applies to any leg of your journey. When in doubt, pack toothpaste in checked baggage to avoid losing it at a checkpoint you did not expect.

Frequently Asked Questions

Can I bring toothpaste in my checked bag without any size limit?

Yes. Toothpaste in checked baggage is not subject to the 3.4-ounce rule. You can pack a full-size tube or multiple tubes of any size. Make sure the caps are tight so they do not leak onto your clothes.

What if I have a toothpaste tube that is exactly 3.4 ounces?

A tube labeled 3.4 ounces is at the limit and will pass through security. TSA officers measure by the label, not by weighing the tube. If the label says 3.4 ounces or less, it is allowed in your carry-on liquids bag.

Do I need to remove my toothpaste from my liquids bag at the checkpoint?

No. Keep your toothpaste inside the sealed quart-sized bag. Remove the entire bag from your carry-on and place it in the security bin. The officer will scan the bag with your toothpaste still inside.

Can I bring toothpaste on a domestic flight within the United States?

Yes, the same 3-1-1 rule applies to all flights departing from U.S. airports, whether domestic or international. Pack toothpaste 3.4 ounces or smaller in your carry-on liquids bag, or any size in checked baggage.

What if my toothpaste leaks during the flight?

Leaks during flight are rare if your cap is tight. If leakage does happen, it is contained inside your liquids bag and will not damage other items. Wrap the cap with plastic wrap or place the tube in a small zip-top bag as extra protection before you pack.