Does a Laptop Bag Count as a Carry-On or a Personal Item?
Most of the time, a laptop bag is a personal item. It goes under the seat in front of you, it does not use up your cabin bag allowance, and you can take it on any fare.
But that is a description of how it usually works out, not a rule. No airline has a category called "laptop bag". What they have is a box, and your bag either fits it or it does not. A slim sleeve and a loaded 16 inch briefcase are both laptop bags, and only one of them is getting under that seat.
So the useful version of the answer is a measurement, and it is worth knowing before you buy the bag rather than at the gate.
The number that decides it
For most European airlines, the small under-seat bag is 40 x 30 x 15 cm. Lufthansa, KLM, Air France, Iberia and ITA Airways all use exactly that figure. It is the closest thing to a European standard that currently exists.
Three things follow from it.
The 15 cm depth is the constraint people trip over. A laptop bag is rarely too tall or too wide. It is too fat, because of what got put in it. Depth is also the dimension that changes after you pack, which is why a bag that measured fine at home fails at the gate.
The 40 cm is the second constraint, and it is the one that quietly disqualifies most briefcases. A briefcase built around a 16 inch laptop needs roughly 42 cm of length to hold the machine plus the padding either side. That is 2 cm over, and 2 cm is enough.
Weight is usually not a constraint at all. Lufthansa, Ryanair, Iberia, ITA Airways, Vueling and Eurowings state no weight limit for the small bag. Four airlines do, and one of them is unusually strict. More on that below.
The new EU rule, and what it does not do
The revised air passenger rights regulation was given final Council adoption on 13 July 2026. It writes the personal item into law for the first time, and the definition is worth reading closely:
A personal item is baggage "either with maximum dimensions of 40x30x15cm or on condition that it fits under the seat in front" of your seat. Airlines must permit one in the cabin at no extra cost.
Two details matter here and both are routinely reported wrong.
First, the definition is an either/or. A bag slightly over 40 x 30 x 15 cm still qualifies if it genuinely fits under the seat. That is more generous than a flat size cap, and it reflects how gate staff have always actually behaved.
Second, only the personal item becomes free by right. The larger overhead cabin bag does not. Earlier in 2026 the European Parliament pushed for a free 7 kg cabin bag as well, and that did not survive into the adopted text. If you have read that a free cabin bag is coming, it is not. The small bag is the guaranteed one.
The rules enter into force twelve months and twenty days after publication in the Official Journal, so this is 2027 reality, not something you can invoke on your next flight.
What each airline allows today
Figures below were read from each airline's own site in September 2026. Allowances change, so check the carrier's page before you fly rather than any summary of it, including this one.
| Airline | Small under-seat bag | Weight limit | Larger cabin bag free? |
|---|---|---|---|
| Lufthansa | 40 x 30 x 15 cm | None stated | Yes, except Economy Basic short and medium haul |
| KLM | 40 x 30 x 15 cm | 12 kg combined | Yes, except Basic |
| Air France | 40 x 30 x 15 cm | 12 kg combined | Depends on fare; not on Basic |
| Iberia | 40 x 30 x 15 cm | None stated | Yes, 56 x 40 x 25 cm |
| ITA Airways | 40 x 30 x 15 cm | None stated | Yes, 55 x 40 x 23 cm |
| Eurowings | 40 x 30 x 25 cm | None stated | No on Basic |
| Transavia | 40 x 30 x 20 cm | 10 kg | No, unless Smart or Max |
| Vueling | 40 x 30 x 20 cm | None stated | No on Fly Light |
| Ryanair | 40 x 30 x 20 cm | None stated | No, Priority only |
| Wizz Air | 40 x 30 x 20 cm | 10 kg | No, WIZZ Priority only |
| easyJet | 45 x 36 x 20 cm | 15 kg | No, paid add-on |
| LOT | 40 x 35 x 12 cm | 2 kg | Yes, 55 x 40 x 23 cm, 8 kg |
Read that table and the pattern is clear enough. The full service carriers converge on 40 x 30 x 15 cm and give you a larger bag as well on anything above the cheapest fare. The low cost carriers are more generous on the small bag, at 20 cm deep instead of 15, and charge for everything above it. easyJet is the outlier in your favour at 45 x 36 x 20 cm, which is large enough for a small trolley case.
Several of these airlines name the laptop bag explicitly. Ryanair's wording is "one small personal bag... such as a handbag or laptop bag". Wizz Air lists "laptop bag" first among the things the free carry-on can be. Eurowings and easyJet both do the same. That is useful, because it settles the category question outright on those carriers. What it does not do is exempt your particular bag from the tape measure.
The one that catches people out
LOT is the exception worth knowing if you fly to or from Poland. The personal item is 40 x 35 x 12 cm and, unusually, it has a hard weight limit of 2 kg.
Two kilograms is not much. A 14 inch laptop is around 1.3 kg on its own. Add a charger and a notebook and you are at or past the limit before the bag itself is counted. In practice, on LOT your laptop bag is your cabin bag rather than your personal item, and that is fine, because LOT includes a 55 x 40 x 23 cm cabin bag at 8 kg on Economy fares. The allowance is there. It is just arranged differently, and copying a Lufthansa habit onto a LOT booking is how people get caught.
Measure your own bag
Measure the bag packed, not empty, and measure the widest point rather than the flat panel. Buckles, a rolled handle and a front pocket with a charger in it all count. Then compare against 40 x 30 x 15 cm, since that is the strictest common standard and a bag that clears it clears almost everything.
Here is our own range against that box, including the results that do not flatter us.
| Bag | Dimensions | Fits 40 x 30 x 15 cm? |
|---|---|---|
| Mantle Sleeve 14" | 35 x 25 x 4 cm | Yes, with room to spare |
| Mantle Sleeve 15.6" | 40 x 28 x 4 cm | Yes, exactly at the limit on length |
| Notion Folio 14" | 35 x 25 x 4 cm | Yes, with room to spare |
| Notion Folio 15.6" | 40 x 28 x 4 cm | Yes, exactly at the limit on length |
| Plenum Folio | 40 x 28 x 4 cm | Yes, exactly at the limit on length |
| Averon Backpack | 40 x 30 x 12 cm | Yes, exactly at the limit on two sides |
| Kova Backpack | 40 x 30 x 12 cm | Yes, exactly at the limit on two sides |
| Orden Briefcase | 42 x 30 x 10 cm | No, 2 cm over on length |
| Sorel Briefcase | 42 x 30 x 8 cm | No, 2 cm over on length |
Both briefcases are over. We would rather say that here than have you find it out at a boarding gate in Munich. They are 42 cm long because they hold a 16 inch laptop with padding on both sides, and there is no way to have that and also be 40 cm. If you mostly fly full service fares that include a cabin bag, this is irrelevant, and the Sorel Briefcase at 42 x 30 x 8 cm and 1,200 g is built for exactly that kind of travel, with a luggage sleeve that slides over a suitcase handle. If you fly basic fares where the under-seat bag is all you get, it is the wrong bag and you should not buy it for that job.
The backpacks are the interesting case. The Averon Backpack is 40 x 30 x 12 cm, which sits exactly inside the box on length and width with 3 cm of depth to spare. At 425 g empty and 15 litres, with a padded compartment for laptops up to 16 inches, it is one of the few bags that holds a large laptop and still qualifies as a personal item on a Lufthansa Economy Basic fare. It is €139. The caveat is the one the numbers imply: exactly at the limit means exactly at the limit, so if you overstuff the main compartment you will lose the width you were relying on.
If your bag is over
You have three options and only one of them is a purchase.
Repack it. Depth is almost always the failure, and depth is almost always the charger, the power bank and the water bottle. Moving those into the coat you are already carrying is free and takes a minute.
Buy the cabin bag. On a fare where the larger bag is a paid add-on, paying for it is often cheaper than replacing a bag you otherwise like, especially if you only fly that carrier twice a year.
Change format. If the under-seat bag is your permanent reality because of how you fly, the honest answer is a sleeve inside a small backpack rather than a briefcase. A Mantle Sleeve 14" is 35 x 25 x 4 cm and 425 g, it costs €69, and it protects the laptop inside whatever bag already clears the box. Our comparison of a sleeve, a folio and a briefcase sets out what each format gives up.
A short checklist
- Measure the bag packed, at its widest point, including handles and buckles.
- Compare against 40 x 30 x 15 cm. Clear that and you clear almost every European carrier.
- Check the depth first. It is the dimension that fails.
- Check the fare, not just the airline. The same carrier gives you a cabin bag on one fare and nothing but the under-seat bag on another.
- On LOT, assume the 2 kg personal item is not for your laptop and use the cabin bag allowance instead.
- Read the airline's own baggage page. Every number here came from one, and every one of them can change.
The point
The category question has a boring answer. A laptop bag is a personal item if it fits under the seat and a carry-on if it does not, and nobody at the gate is interested in what the product listing called it.
What that means in practice is that cabin allowance is a buying criterion, not a travel detail. If you fly basic fares regularly, the 40 cm and the 15 cm belong on your requirements list next to the laptop size. If you do not, they do not matter at all and you should buy the bag that suits your desk and your commute instead.
Once you know the format, getting the fit right is the next step: how to measure your laptop covers that properly. And if you are wondering what happens to the laptop once you reach the checkpoint, we wrote separately about whether you still have to take it out at security. The full range sits in the bags collection.
Airline figures read from each carrier's own baggage pages in September 2026. EU definition quoted from the adopted joint text of the revised air passenger rights regulation, PE-CONS 39/26, given final Council adoption on 13 July 2026. Bag dimensions and weights as listed on each product page.
