Yes, you can bring powder through TSA. There is no ban on powder in a carry-on bag. What there is instead is a 12 ounce threshold that changes how your bag gets screened, and a real chance of losing the container if the officer cannot resolve what is inside it.
This is one of the least-known rules at the checkpoint, and it catches gym travelers, new parents, and anyone flying home with a tin of spices.
The 12-Ounce Powder Rule
The rule is simple to state:
Powder-like substances over 12 oz (350 mL) in a carry-on must be placed in a separate bin for X-ray screening. They may require additional screening, and the container may need to be opened.
Under 12 oz, powder is treated like any other item in your bag. Nothing to declare, nothing to remove.
The part travelers do not expect is the ending. If a powder over 12 oz cannot be resolved at the checkpoint, it is not allowed into the cabin and it is disposed of. You do not get to run it back to the car, and at that point you cannot check it either unless you have time to exit and go back to the counter.
Note that the threshold is by container size, not total powder in the bag. Two 10 oz tubs are two under-threshold containers. One 20 oz tub is one over-threshold container.
Why Powder Is Screened This Way
X-ray imaging reads density. A large, uniform block of fine powder is dense and opaque in a way that hides what is behind and inside it, which is exactly the property a threat item would want. The 12 oz threshold is a practical cutoff: below it, the mass is small enough to see through and around.
That is also why the resolution step is physical. If the image is ambiguous, the officer opens the container and swabs it for explosive trace residue. Nothing about that process implies suspicion of you personally.
Powders That Are Exempt From Additional Screening
Certain categories are exempt from the secondary screening step, though they may still be inspected:
- Baby formula (powder), along with breast milk and toddler drinks
- Medically necessary powders, including powdered medication and prescription supplements
- Human remains, meaning cremated ashes
For formula and medical powders, the practical advice is the same as for flying with medication: tell the officer before your bag goes on the belt, keep the item in its original labeled container, and pack it somewhere you can reach without unpacking the whole bag. Our flying with kids through TSA guide covers the formula and baby-food process in full.
Cremated remains deserve a specific warning. TSA officers will not open a container of ashes under any circumstances, even to help you. That means if the container cannot be screened by X-ray, it cannot fly in the cabin. Urns made of stone, ceramic, metal, or thick marble are frequently opaque to X-ray and get refused for that reason. If you are transporting ashes, use a temporary container made of wood, plastic, or cardboard and carry the crematory paperwork.
Common Powders, Sorted
| Item | Carry-on | Notes |
|---|---|---|
| Protein or energy powder | Yes | Over 12 oz goes in a separate bin and may be opened |
| Baby formula (powder) | Yes | Exempt from additional screening, declare it |
| Powdered medication | Yes | Exempt, keep labeled |
| Dry shampoo (powder form) | Yes | Powder, not a liquid. Aerosol dry shampoo is a liquid |
| Powder makeup, foundation, bronzer | Yes | Almost always under 12 oz |
| Baby powder and talc | Yes | Large bottles cross the threshold easily |
| Spices, seasoning, coffee grounds | Yes | Large quantities regularly get pulled for a look |
| Protein bars, granola | Yes | Solid food, not powder |
| Cremated remains | Yes | Must be X-ray screenable, officers will not open it |
| Powdered laundry detergent | Yes | Over 12 oz goes in the bin |
Powder makeup is worth calling out for a separate reason: it does not count against your 3-1-1 liquids allowance. Only liquids, gels, aerosols, creams, and pastes do. If you are trying to fit a cosmetics bag into a quart bag, switching liquid products to powder or stick versions is the single most effective move. Our 3-1-1 liquids rule guide has the full list of what counts.
Checked Bags Have No Powder Limit
TSA sets no quantity limit on powder in checked baggage. If you are flying with a 5 lb tub of protein powder, the answer is almost always to check it. See our TSA checked bag rules guide for what else belongs down there.
Two caveats:
- Customs is a separate authority. Bringing food powders, spices, or supplements into another country is governed by that country’s agricultural and customs rules, not TSA. Some spices and seed-based powders are restricted.
- Checked bags get opened too. A large unlabeled bag of white powder in checked luggage is going to be inspected. Keep it in a labeled retail container and you avoid the conversation entirely.
How to Get Powder Through Without Losing Time
Keep it in the original container. A labeled, sealed retail tub screens fast. A zip bag of unlabeled white powder is the version that gets opened and swabbed, and occasionally discarded.
Split large quantities. Scoop what you actually need for the trip into a smaller container under 12 oz. Most travelers packing a full protein tub need about a week’s worth.
Declare it before the belt, not after. If you have formula, medical powder, or ashes, say so while you are loading bins. Once the bag is in the machine you have lost the easy path.
Put big powders where they can be pulled. If a tub is going to come out anyway, having it at the top of the bag saves the officer unpacking the rest of your things.
PreCheck does not exempt you. In a PreCheck lane you generally leave everything in the bag, but an officer who sees a large powder mass on the X-ray can still pull the bag for a separate look. PreCheck shortens the queue, it does not change what the machine sees.
Frequently Asked Questions
How much powder can you bring on a plane?
There is no hard limit. Powder containers over 12 oz (350 mL) in a carry-on must be placed in a separate bin for X-ray screening and may be opened and tested. Under 12 oz, powders are screened normally inside your bag. Checked bags have no powder limit at all.
Can you bring protein powder in your carry-on?
Yes. Protein and energy powders are allowed in carry-on bags. If the container is over 12 oz, put it in a separate bin at the checkpoint and expect it may be opened. To avoid the delay entirely, scoop a trip’s worth into a smaller labeled container or check the full tub.
Does powder count toward the TSA 3-1-1 liquid rule?
No. The 3-1-1 rule covers liquids, gels, aerosols, creams, and pastes. Powder and solid stick products do not count against your quart bag, which is why switching to powder makeup and solid deodorant frees up real space.
What happens if TSA cannot screen my powder?
If a powder over 12 oz cannot be resolved at the checkpoint, it will not be permitted into the cabin and will be disposed of. This is why large unlabeled containers are risky and original retail packaging is worth keeping.
Is baby formula exempt from the powder rule?
Yes. Powdered baby formula, along with breast milk and toddler drinks, is exempt from additional powder screening and is not subject to the 3-1-1 limit. Declare it to the officer before screening and keep it accessible in your bag.
Can you fly with cremated remains in a carry-on?
Yes, but the container must be screenable by X-ray. TSA officers will not open a container of ashes for any reason, so stone, ceramic, and metal urns are frequently refused. Use a temporary wood, plastic, or cardboard container and carry the crematory documentation.
Can you bring spices or coffee grounds through security?
Yes. Both are treated as powders. Quantities over 12 oz go in a separate bin and may be inspected, and large amounts of loose spice regularly draw a closer look. Retail packaging with a visible label is the fastest way through.
Check the Line Before You Pack the Tub
The powder rule costs most travelers a couple of minutes. The line in front of it costs them a lot more, and unlike the powder rule, it changes hour to hour.
Look up your airport on Airport TSA Times to see when its checkpoints are busiest, from TSA’s own hourly counts, so you aren’t squeezing an extra bin into the rush.