Can you bring toothpaste on a plane?
Toothpaste counts as a liquid even though it is a paste. That single classification is behind almost every tube confiscated at security.
By Michael W. · Last updated October 17, 2026
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Yes - toothpaste is allowed in carry-on baggage in a container of 3.4 oz / 100 ml or less, inside the single quart-sized bag the 3-1-1 rule permits. In a checked bag there is no size limit at all. A standard family tube is 5.6 to 6.4 oz, which is why so many get surrendered at the checkpoint.
The classification is what catches people out. Toothpaste is a paste, and under screening rules the category is liquids, aerosols and gels - pastes included. It is treated exactly like shampoo: the limit is on the container's stated capacity, not on how much is left in it, so a nearly empty 6-ounce tube still fails.
Toothpaste tablets are not a liquid
Toothpaste in tablet or powder form is a solid, so it is not subject to 3-1-1 at all and does not go in the quart bag. For carry-on-only travel it is the cleanest answer available - no size limit, no bag space used, and nothing that can leak.
Toothpaste, by where it is travelling
| Form | Carry-on | Checked bag | Counts against the quart bag? |
|---|---|---|---|
| Travel tube, 3.4 oz / 100 ml or less | Allowed | Allowed | Yes |
| Family tube, 5.6-6.4 oz | Not allowed | Allowed, any size | n/a |
| Toothpaste tablets or powder | Allowed, no size limit | Allowed | No - it is a solid |
| Tooth gel marketed for kids | Allowed at 3.4 oz or less | Allowed | Yes - gel is in the category |
Why a paste counts as a liquid
The screening category is liquids, aerosols and gels, and it is defined by behaviour rather than by everyday language: anything that flows, spreads, sprays or can be poured belongs to it. Toothpaste, deodorant gel, mascara, peanut butter and soft cheese all qualify. Stick deodorant and a bar of soap do not.
- The limit is 3.4 oz / 100 ml per container, and it is read off the container, not the contents.
- All of those containers must fit in one quart-sized bag, and the bag has to close.
- One bag per passenger, including children - a family of four has four quart bags, not one big one.
The full rule including the exemptions - medication, baby formula, duty free - is in TSA liquid rules.
What changes on an international flight
The limit is the same number in different units, and the units are the trap. Most of the world screens at 100 ml; the US equivalent is written as 3.4 oz, which is actually 100.55 ml. A travel tube moulded to exactly 3.4 oz is therefore marginally over the metric limit, and in a strict European or Asian airport it can be pulled.
Buy containers marked 100 ml or below, or buy smaller ones, and the problem disappears. The broader international version of the toiletry problem is covered in best toiletry bags for international travel.
What to do with a full-size tube
- If you are checking a bag, put it in the checked bag. There is no size limit there and nothing further to think about.
- If you are carry-on-only, buy a travel tube of 3.4 oz or less - toothpaste is one of the few products reliably sold at travel size everywhere.
- Or switch to tablets, which sidestep the category entirely and free up quart-bag space for the liquids you cannot replace.
- Do not decant toothpaste into a 3 oz bottle. It is too thick to dispense from a travel bottle and you will not get it back out.
- Buy it at your destination if the trip is long - toothpaste is cheap and available everywhere, and it weighs more than it is worth carrying.
Solid alternatives go further than toothpaste alone: shampoo bars, conditioner bars and solid soap all leave the quart bag entirely. Solid toiletries for travel covers which ones actually work.
Quick picks
The short list. Tap any row for the full write-up, including what each one is bad at.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 |  Bagsmart Clear TSA-Approved Toiletry Bag A clear quart-sized pouch that comes out of the bag and goes back in without repacking a toiletry kit. | Anyone who flies carry-on-only | $8.99View on Amazon #ad Price as of November 3, 2026. How we’re funded |
| 2 |  Bite Whitening Toothpaste Tablets Chewable tablets in a small tin - a solid, so no size limit and no quart-bag space. | Carry-on-only travel and long trips | $23.69$24.995% offView on Amazon #ad Price as of November 3, 2026. How we’re funded |
| 3 |  Humangear GoToob+ Silicone Travel Bottles Soft silicone bottles with a positive seal, under the limit with margin rather than exactly on it. | Shampoo, conditioner and body wash at 3 oz | $28.99View on Amazon #ad Price as of November 3, 2026. How we’re funded |
The bag the rule actually describes
Bagsmart Clear TSA-Approved Toiletry Bag
The rule is one quart-sized bag per passenger, and screening is quicker when yours obviously is one. A dedicated clear pouch means the liquids come out as a unit and go through on their own rather than being excavated from a toiletry bag with a queue behind you - and it is the format officers are looking for, which matters more than it should.
The specs that decide it
- Size: Quart-sized, as the 3-1-1 rule specifies
- Holds: Toothpaste, plus the rest of the 3.4 oz liquids
- Clear: Contents visible, so screening is faster
- Limit: One bag per passenger, and it must zip closed
Flaws but not dealbreakers
It is one quart and no more - a full skincare routine will not fit, and the honest fix is fewer products rather than a second bag, which is not permitted. Clear PVC also cracks eventually at the fold lines.
#ad Price as of November 3, 2026. How we’re funded
The one that is not a liquid at all
Bite Whitening Toothpaste Tablets
This is the structural fix rather than a workaround. Tablets are a solid, so they are outside 3-1-1 completely: no 3.4 oz cap, no quart bag, nothing to declare. You chew one, brush, and the whole thing travels in a tin the size of a lip balm. On a two-week trip it also removes the mid-trip problem of a travel tube running out.
The specs that decide it
- Form: Solid tablets - not a liquid, aerosol or gel
- Screening: No size limit, does not go in the quart bag
- Packs: A small tin, refillable
- Leaks: Cannot - nothing to leak
Flaws but not dealbreakers
The texture takes getting used to - you chew it to a paste before brushing, and it foams far less than tube toothpaste, which makes it feel like it is not working even when it is. It is also much more expensive per brush than a tube.
#ad Price as of November 3, 2026. How we’re funded
The ones to decant the rest of the kit into
Humangear GoToob+ Silicone Travel Bottles
Toothpaste tubes are easy to buy small; shampoo and conditioner mostly are not, and the cheap decanting bottles are the ones that empty themselves into your quart bag. These have a genuine valve rather than a flip cap, squeeze flat as they empty, and their stated capacity is comfortably under 100 ml - which matters abroad, where a bottle moulded to exactly 3.4 oz is 100.55 ml and technically over.
The specs that decide it
- Capacity: Under the 3.4 oz / 100 ml limit with margin
- Seal: Valve rather than a flip cap - the format that leaks least
- Body: Soft silicone, squeezes flat, labelled dial on the cap
- Use: Shampoo, conditioner, body wash, lotion
Flaws but not dealbreakers
They are expensive for what they are, and silicone picks up the smell of whatever lived in it previously - a bottle that held a strong shampoo never fully returns to neutral.
#ad Price as of November 3, 2026. How we’re funded
Frequently asked questions
Can you bring toothpaste in your carry-on?
How big can toothpaste be in a carry-on?
Do toothpaste tablets count as a liquid?
Read next
- TSA liquid rules
- Travel size toiletries guide
- Solid toiletries for travel
- Can you bring a razor on a plane?
- Best travel toiletry bottles
- How to pack toiletries
More in Toiletries, or see every roundup and comparison on the site.