How Big is a Quart Size Bag for Carry On?

You might be aware of the Transportation security administration or TSA fluid restrictions, which state that each container must not exceed 3.4 ounces (100 milliliters). Still, you may not know what constitutes a quart-sized carrier bag. The TSA doesn’t recommend any particular type of carrier bag, but they do like it when passengers bring ones that can be sealed and are made of transparent plastic so that they can be inspected quickly.

quart size 8.5 x 8.11 x 1.34

Regardless of how frequently you move, you should always invest in a high-quality suitcase or backpack that can accommodate all of your belongings while fitting comfortably within the dimensions and weight restrictions imposed by the airline.

Quart Size definition

The quart represents one-fourth of a US gallon or 32 oz. (0.95 liters), in the US Customary System of measurement for liquids. Assuming that 1 liter is equivalent to 32 ounces of liquid, this carrier bag would be around the dimension of a one-liter bottle. However, you can fit nearly one liter of fluids inside the quart-sized carrier bag.

The TSA’s proposal that travelers carry all liquids in a quart-size bag seems reasonable. It looks logical until you realize the TSA’s mathematicians are asking the public to solve an unsolved issue by restricting Ziploc bag sizes. When you put anything in a 2-dimensional Ziploc bag, the bag takes on a complicated geometric shape, making it impossible to calculate its volume. Thankfully, we can be sloppy. It’s wrong. TSA restrictions on one-quart carry-on baggage are perplexing.

How Big is a Quart Size Bag for Carry-On?

Your Quart Size bag for carry-on should be less than 0.95 cubic decimeters or less than 58 cubic inches. So when you multiply bag dimensions in inches, you need to get a number less than 58.

However, Transportation Security Administration TSA is not strict about the quart-size bag, so that you can bring even more significant than a 1-quart toiletry clear bag. For TSA, the most important is the 3-1-1 liquids rule, where “each passenger may carry liquids, gels, and aerosols in travel-size containers that are 3.4 ounces or 100 milliliters”.

But if we decide to be strict, let us see which quart bags will pass and which not follow TSA rules:

Quart Bag SizeCubic inches volumeTSA - less than 1 quart
5.5 x 1.5 x 7 inches57.75Pass
5.91 x 1.85 x 7.48 inches81.7Above 1 quart
6.25 x 6.25 x 1 inches39Pass
7.9 x 7.1 x 0.4 inches22.4Pass
7 x 0.75 x 8 inches42Pass
7.7 x 5.5 x 2.5 inches105.8Above 1 quart
7.7 x 5.9 x 2 inches90.86Above 1 quart
7.7 x 5.9 x 2.5 inches113.57Above 1 quart
7.7 x 5.9 x 2.8 inches90.86Above 1 quart
8 x 7 x 0.8 inches44Pass
8.5 x 8.11 x 1.34 inches92Pass
11.81 x 8.66 x 0.39 inches40Pass

This Table is not an official Table. TSA rules for bag size are not strict. However, if you want to find a Quart size bag that is less than 1 quart, you can try Lermende, which is 7.9 x 7.1 x 0.4 inches and 2.24 ounces in weight:

lermende 7.9 x 7.1 x 0.4 inches - quart size bag TSA




Just how big is a bag that measures a quart?

  • How many quarts does a bag hold?
  • I need to know how big a quart bag is.
  • What kind of plastic bag should I bring to store my liquids?
  • When packing your toiletries, what size bag do you recommend?
  • What’s the best size bag for drinks and gels?

Clear 1-quart bags come in several sizes. When you need to pack liquids in your carry-on, a 6-by-9-inch plastic bag isn’t always accessible. How big are Ziploc bags? Are they less than 1 quart? Don’t worry; we’ve got you.

Estimator for Quart-Sized Flat Bags

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There are several 1-quart bag sizes. Sandwich bags may be used to carry on liquids. 6.5 by 5.8 inches, 0.7 quarts. A sandwich bag holds 70 percent of the allowable beverages for flight.

Here’s my take:

“Quart-sized” doesn’t mean 1 quart (946 ml) for the TSA.

A quart is 1/4 gallon. You’re not filling a liquid bag with tap water. You’re storing bottles and other items inside. Your toiletries will overflow your quart bag.

The TSA requires quart-sized plastic bags or smaller ones. For easy examination, they want clear acrylic. They need the sight of 3.5-ounce containers. After terrorists tried to carry liquid explosives onboard an aircraft in 2007, these restrictions were set, and I believe they’ve been changed.

The TSA should reevaluate its recommendations in 2020 to clarify there’s a better way than utilizing non-recyclable plastic bags, even though it seems foolish to worry about the TSA liquids bag’s environmental impact while flying and releasing tonnes of CO2. Reusing bags save the environment, so if you carry a lot of toiletries, invest in a sturdy bag.

Lies About One-Quart Bags That Pass TSA Security

TSA allows clear quart-sized bags. They don’t advocate certain producers. If this were true, many “TSA-approved” bags would fail because it’s not a quart. Gusseted bags are standard. Their shallow depth means they hold more than 1 quart even with a 6 x 9-inch surface.

Consider this bag. Amazon’s best-retailing TSA-permitted quart-sized bag. Rectangular bag volume may be estimated. Seventy-two cubic inches (7.2 x 5.2 x 2), which is 1.25 quarts, 25 percent too big for TSA. They may still call it a “quart-sized bag.” This design’s bags are sometimes overly large. Is it important? The answer likely rests in how severely TSA controls liquids in carry-on baggage.

How Strict is TSA with quart-size bags?

TSA is not strict with quart-size bags because it is most important that bags be plastic and clear to make the screening process faster. TSA wants to enforce the 3-1-1 liquids rule and improve the screening process using clear toilette bags. 

This is when you realize that fretting over things was probably unnecessary. Ultimately, it’s up to the discretion of the TSA agent to check your carry-on luggage. Even if they do notice, they probably won’t judge you harshly based on the size of your toiletry bag.

If you check the analyses on Amazon, you’ll notice that although it’s almost hard to locate a clear translucent “TSA acquiescent” quart bag that’s genuinely 1-quart size, people seem to be delighted with the products nonetheless. A non-flat toiletry bag is a way to go if you want to attempt to bring along more amenities on your trip.

If the bag’s face is around six by 9, it won’t draw as much attention and will probably go unchecked for size. A sack measuring six by nine by 2 inches, or about 2 quarts, would quickly get you through. If it looks like a softback reserve when held up to the light, it will pass the TSA’s inspection. Nothing has to be measured or modeled mathematically.


1. How many quart-sized bags are allowed on an airplane?

Limit one bag containing liquids per person in carry-on baggage.

2. What is the rule for liquids in carry-on bags? Must they all fit in a quart-sized bag?

It’s safe to say that. Be sure to use containers under 100 ml (3.4 oz) of liquid for all your drinks. One baggie is all right. And you may only bring one bag with you.

Liquids larger than 3.4 ounces must be placed in checked baggage. The only permitted beverages are infant foods such as breast milk, formula, and juice.

The Judgment

When the TSA doesn’t care whether toiletry bags are the right size, why should the manufacturers? That’s precisely why they shouldn’t. Baggage that can store more liquids and hence more toiletries will sell better. It won’t dent their bottom line if 1% of travelers have an issue since the other 99% will never know about it.

You can’t truly rely on the “3-1-1 liquid regulation.” As a general guideline, you may consider it. TSA agents do not stand with measuring tapes to assess the volume of your liquids carry-on. Only very egregious instances of breaking the 3-1-1 rule get attention.

This is understandable since the security queues would surely swell if the TSA unexpectedly began strictly enforcing the quart bag regulations. If you need more room but don’t want to draw attention to yourself, use a gusseted bag instead of a flat, enormous container similar to a gallon Ziploc.

So, it’s up to you…

Is complete compliance your goal? Is it your goal to be a conformist and not attempt to bring any additional drinks on your trip? While you’re busy fretting about whether or not your quart-sized suitcase will get through security, around ten individuals in the United States show up at the checkpoint every day with loaded firearms. To put it mildly, that’s weird.

If your toiletry carrier bag is around the size of a quart carrier bag (roughly 6 inches tall by 9 inches long), you should be OK passing through security. Before putting your carry-on through the X-ray machine, remember to take out your full toiletries carrier bag and drop it in the designated receptacle.

The carrier bag is an appropriate size with a total measurement of 14 inches.

To what extent do you enforce the quart carrier bag size?

The TSA isn’t picky about size or material for quart-sized carrier bags. If you don’t pack a lot of toiletries, you should be OK if your luggage is somewhat more significant than the allowed dimensions. A quart-sized Ziploc carrier bag will also work; ensure it’s not too large for the job.

You may relax regarding the size of your toiletry carrier bag since most manufacturers try to adhere to the specified measurements to boast that their carrier bags are TSA certified.

Is Transparency Required for Quart-sized Carrier bags?

The TSA doesn’t mandate that the quart-sized carrier bag be completely see-through. The requirement that the quart-sized carrier bag is see-through is ignored. Lauren recently asked whether or not her exquisite toiletry carrier bag is permitted in the cabin carrier baggage alone.

According to the TSA’s response, a quart-sized carrier bag is standard. No strict guidelines exist regarding acceptable carrier bag styles.

Nick was concerned that he wouldn’t be able to get through security with his open-top pouch that could be seen through since it wasn’t completely see-through. The 3-1-1 rule specifies a quart-sized carrier bag as carry-on luggage; however, is this carrier bag required to be completely transparent? Has anybody tried this fine mesh?

Nick was permitted to use his mesh wash carrier bag.

How Many 5 Gallon Tote Carrier bags Fit in a Carry On?

Passengers have been known to attempt to smuggle 2-quart carrier bags onboard aircraft; however, they are usually discovered and removed. Each person was only permitted one carrier bag no more than a quart in size through TSA screening, but you were allowed as many carrier bags as you wanted in your checked carrier baggage.

However, if you want to be sure you have plenty of the same drinks, you may pack many identical containers. If you need to bring 6.8 ounces / 201 milliliters of shampoo but can only bring a carry-on, you may divide the bottle into two 3.4-ounce / 100-milliliter bottles and pack them in your quart-sized carrier bag.

But what if I don’t have a carrier bag that holds a quart?

You may use a Ziploc carrier bag or even a food storage carrier bag instead of a quart-sized carrier bag if you don’t have one; the TSA doesn’t require any particular toiletry carrier bag. The only thing they care about is that the carrier bag isn’t too big and the liquids fit inside it.

The Finest Travel Carrier bag For A Quarter

  • Lemonade Clear Toiletry Carrier bag, 2-Pack Dimensions: 7.7 x 5.9 x 2.5
  • ProCase TSA-Approved Travel Toiletry Carrier bag Pouch on Amazon Dimensions of 8.85 x 5.10 x 2.15 inches
  • Clear 3-1-1 Travel Toiletry Carrier bag, Approved by TSA – 6.25 x 6.25 x 2.50
  • Zippered travel toiletry carrier bag dimensions of inches


A quart-sized carrier bag is around (6′′ x 9′′) in dimensions, in case you were wondering; nevertheless, the TSA mediator will not degree your luggage, but he will notice if it is too outsized. If your toiletries carrier bag isn’t too large, there shouldn’t be an issue. The number of liquids rather than their kind is the primary concern of the TSA’s liquid guidelines.

Igor Milosevic
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