Backpack for 15.6" vs 16" laptops: what changes and how to choose.
1) Mistake #1: inches = screen diagonal (not the laptop body)
The size “15.6” or “16” refers to the diagonal measurement of the screen and does not include the bezel or the thickness of the device.
Therefore, two 16-inch notebooks can have different physical dimensions — and a 15.6-inch backpack may or may not fit.
2) How to measure to ensure it fits (the method that avoids returns)
To confidently choose a backpack/laptop bag, you take two measurements:
A) Measures the diagonal of the screen (for the “class” 15/16)
As Currys explains, he measures the screen diagonally .
B) Measure the body of the notebook (width, height, and thickness)
Everki recommends measuring the width of the laptop body at its widest point, as well as its depth/thickness, to ensure compatibility with the bag.
Shopping tip: what really matters is the compartment size (in cm), not just "up to 15.6".
3) 15.6 vs 16: when it “works” and when it “doesn’t work”
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Many brands sell "15-inch" bags that "go up to 15.6". Targus itself mentions that "15-inch" bags can accommodate up to 15.6 inches and suggests "going up a size" if you have doubts about the frame/dimensions.
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On a 16” laptop, the difference might be small… but the thickness and width could be what prevents it from closing properly.
Practical rule (good for Portugal):
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If you have a 16” laptop and carry a hard case, large charger, and power bank → choose a 16” (or 17”) backpack to have some extra space.
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If you have a 15.6” head and want something more compact → a 15.6” backpack with a well-padded compartment.
4) What defines a good laptop backpack (for work and travel)?
Thule highlights the importance of a dedicated, padded compartment for impact protection.
Are you looking for this (without complicating things):
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padded compartment (ideally suspended from the bottom)
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Reinforced base (for safe landing)
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Padded back + comfortable straps (if you're going to wear it daily)
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Internal organization for chargers and accessories.
5) For air travel: laptop backpack as a "personal item"
If your idea is to use the backpack as a "personal item":
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Ryanair: personal bag up to 40x30x20 (under the seat)
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TAP: personal item up to 40×30×15 (2 kg)
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easyJet: small bag up to 45×36×20
In conclusion: if you travel a lot on a budget, buy a backpack thinking about the dimensions of the personal item first — and only then about the "liters".
6) Skill and organization: what makes a difference in daily life
For Portugal (commute + transport + cafes):
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Quick pocket for pass/cell phone
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Separate compartment for cables (prevents scratching the laptop)
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space for a bottle and a small umbrella
Tip: A very "soft" backpack might be comfortable, but it offers less protection. A structured backpack with a solid back and base is much better.
7) Short guide by buyer profile (very "Google-like")
"I want a laptop backpack for work."
→ Prioritizes comfort, organization, and a discreet appearance.
"I want a laptop backpack for traveling."
→ Prioritizes personal item measurements, quick access, and a padded compartment.
"I'm a student and I carry my laptop every day."
→ Prioritizes ergonomics and lightness + padded compartment.
Purchase checklist (15.6/16 error-free)
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I measured the diagonal (screen) and the body (width/thickness).
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I checked the laptop compartment measurements (cm), not just “15.6”.
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Do I need to use this as a personal item? (40×30×20 / 40×30×15 / 45×36×20)
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Padded compartment and reinforced base
FAQ
Will a 15.6-inch backpack fit a 16-inch laptop?
It depends on the physical dimensions and the compartment. Brands like Targus suggest "going up a size" if there are doubts about the frame/dimensions.
Why does my "15" look bigger?
Because the inches refer to the screen size, and the bezel can increase the actual size of the device.