Joybuy Insights

Choosing a 15.6-inch laptop backpack: watch out for these sizes, compartments and pitfalls

A 15.6-inch laptop backpack may seem straightforward to choose on paper. However, not every model with this label will fit every laptop. A 15.6-inch screen reveals little about the device’s overall dimensions. A slim laptop, charger, lunchbox and documents can also take up more space than expected.

For students, school pupils, professionals and commuters, three things are particularly important: a suitable laptop compartment, protection from rain and a layout that suits your everyday needs. Below, you’ll find what to look out for and which models are suitable for different situations.

Common pitfalls when choosing a laptop backpack

1. Only looking at “15.6 inches”

The screen size is measured diagonally. The laptop casing can vary depending on the bezels, keyboard and construction. So measure the height, width and thickness of your laptop and compare these measurements with the internal dimensions of the laptop compartment.

A backpack may be described as suitable for 15.6 inches, yet still be a tight fit for a business laptop with a wider casing. Also check whether there is enough room for a protective sleeve.

2. Confusing “waterproof” with completely watertight

Many product titles use terms such as waterproof, water resistant or anti-splash. In practice, this may mean that the fabric helps repel splashes or a brief shower. It does not automatically mean that the seams, zips and laptop compartments will remain watertight for a long time.

If you cycle every day in the Netherlands, it’s better to look for:

  • A water-repellent or water-resistant outer fabric
  • Covered or splash-resistant zips
  • A laptop compartment that is not positioned directly against the bottom of the bag
  • A separate rain cover if you need long-lasting protection

According to Beneunder’s product description, the fabric used is resistant to wind, rain and stains. This is a product specification from the brand; it is not a guarantee that the contents will stay dry in all weather conditions.

3. Lots of compartments, but no practical layout

A backpack with multiple compartments can help keep everything organised, but only if the compartments are large enough for your belongings. Pay attention to the position of the laptop compartment, the space available for a charger and how easily you can access smaller accessories.

A business model with a laptop compartment, document compartment and space for a water bottle works differently from a travel backpack with a laptop compartment that also needs to hold clothing and toiletries. A large capacity is not always useful if you mainly travel light.

The most important specifications to check

Laptop compartment and protection

A suitable laptop compartment should hold your laptop reasonably securely. Too much room for movement can cause the device to shift against the side of the bag as you walk. Soft lining helps reduce scratches, but a backpack is not a hard protective case.

Also check whether:

  • The laptop compartment closes fully with a zip, hook-and-loop fastening or buckle
  • The bottom is raised further away from the ground
  • The compartment is suitable for your laptop’s exact dimensions
  • The laptop is kept away from keys, drinks bottles and other hard objects

Capacity: compact or spacious

For commuting, a capacity of around 10 to 20 litres is often enough for a laptop, charger, documents and a few personal items. If you carry sportswear, lunch and extra clothing, you’ll probably need a spacious laptop backpack of 20 to 30 litres.

An expandable backpack offers flexibility. Do pay attention to the dimensions when the bag is expanded, though. Extra capacity can be useful for a short trip, but it also makes the bag fuller and potentially heavier on your back.

Carrying comfort and weight

A lightweight bag helps keep the overall weight down, but also consider the shoulder straps and back panel. Wide, adjustable straps distribute pressure more effectively. A chest strap can be useful when cycling, walking or carrying a full bag.

Place heavy items as close to your back as possible. This is generally more stable than keeping the charger, books and water bottle all at the outer edge of the bag.

Our recommendations by use case

Suitable for: Budget-conscious beginners
Beneunder LC183 expandable backpack

Beneunder LC183 Expandable Backpack 10L

Why it suits this profile: This compact backpack is designed for everyday use, short journeys and light luggage. Do check your laptop’s dimensions before buying, as the product information does not state a maximum screen size for the laptop compartment.

How this product avoids the pitfall

The capacity is clearly specified as 10 litres, expanding to 13 litres. This gives you a better idea in advance of how much luggage will fit than an unclear marketing claim would.

Main benefit & advantages

Lightweight at 8.3 oz, with expandable capacity and nylon fabric that, according to the product description, helps resist wind, rain and stains.

Suitable for: Shoppers seeking premium quality
HP Travel 25L 15.6-inch laptop backpack

HP Travel 25L 15.6-Inch Blue Laptop Backpack

Why it suits this profile: This model is ideal for professionals and travellers looking for a business backpack with room for equipment, clothing and everyday essentials.

How this product avoids the pitfall

The capacity is clearly stated as 25 litres, expandable to 30 litres. The compartments and maximum laptop size of 15.6 inches are also specified.

Main benefit & advantages

25 to 30 litres of capacity, chest straps, lockable zips and a hidden RFID-blocking compartment, according to the product description.

Suitable for: Specific uses & intensive users
Expandable cabin backpack, 25 to 35 litres

Expandable Carry On Backpack 25L to 35L

Why it suits this profile: A practical choice for travellers, weekend users and commuters who want a travel backpack with a laptop compartment and variable capacity.

How this product avoids the pitfall

The capacity is not merely described as “large capacity”; it is stated as 25 litres and expandable to 35 litres. For air travel, do check your airline’s rules in advance.

Main benefit & advantages

Expandable capacity from 25 to 35 litres, multiple compartments and a design described as water-repellent in the product title.

Which laptop backpack suits your needs?

  • For school: choose a laptop backpack for school with a separate laptop compartment, room for books and a sturdy base.
  • For commuting: a commuting backpack should be comfortable to wear and have space for a charger, lunch and documents.
  • For the office: a business backpack with well-organised compartments and a discreet design is often more practical than a large travel model.
  • For travelling: look for a cabin backpack with a luggage strap, accessible compartments and dimensions that you have checked with the carrier in advance.
  • For changing loads: an expandable backpack is useful when you take little with you on the outward journey but need extra space on the way back.

For models with an external USB port, check whether the bag only provides a cable pass-through or also includes a power bank. A power bank is often not included. Also keep electronics away from moisture, even when the outer fabric is water-repellent.

Looking for more options?

We’ve put together a complete, up-to-date list of products that fully meet these strict selection criteria and the applicable European safety regulations.

Frequently asked questions about a 15.6-inch laptop backpack

Will every 15.6-inch laptop fit in a 15.6-inch laptop backpack?

No, not always. Measure the laptop itself and compare its dimensions with those of the compartment. Also consider the laptop’s thickness and whether you use a protective sleeve.

How many litres of capacity does a laptop backpack need for everyday use?

For just a laptop, charger and documents, around 10 to 20 litres is often enough. For sportswear, lunch or a short overnight stay, 25 litres or more is more practical. An expandable model gives you extra flexibility.

How do I clean a laptop backpack?

Follow the manufacturer’s instructions. For example, Beneunder LC183’s instructions state that you can wipe the outside with a damp cloth and leave the bag to air-dry. Avoid using a washing machine or exposing the bag to prolonged direct heat unless permitted.