40 Liter Backpacks

40 Liter Backpacks

40 Liter Backpacks

Max out your packing space while still being carry on compliant, even on budget and European airlines.

The Tortuga 40L was more than enough... It carried 2 1/2 weeks worth of clothes, iPad 12.9”, meds, vitamins and other misc items. It all fit in easily.

—Reuben Verified Buyer

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FAQs

How big is a 40L backpack?

A 40 liter backpack measures about 22 × 14 × 8 inches (55 × 35 × 20 cm). This is the maximum carry on size that fits most airline overhead bins, making 40L the perfect size for travelers who want to pack as much as possible while avoiding checked bag fees.

Is a 40L backpack allowed as carry on?

Yes, 40 liter backpacks are allowed as carry ons if they meet size requirements. Tortuga's 40L travel backpacks measure 22 × 14 × 8 inches, fitting within US limits (22 × 14 × 9 inches) and most international limits (55 x 35 x 20 cm). Always check your airline's rules before flying.

How many days can a 40L backpack last?

A 40 liter travel backpack can hold enough clothes for 7-10 days, depending on your packing style and the weather at your destination. This capacity includes a week's worth of clothes, toiletries, accessories, and a laptop, everything you need for extended travel without checking bags.

Is 40L big enough for traveling?

Yes, 40 liters is the sweet spot for travel backpacks. It provides maximum packing space while staying carry on compliant, making it ideal for trips lasting a week or more. The Tortuga Travel Backpack Pro and Lite both offer 40L capacity with travel-optimized organization.

Does a 40L backpack fit under an airplane seat?

No, 40 liter backpacks are usually too tall to fit under airplane seats as personal items. Personal items typically must be under 18 × 14 × 8 inches, while 40L backpacks measure 22 × 14 × 8 inches. However, 40L backpacks fit perfectly in overhead bins as carry ons.

You don't want the cost and hassle of checking luggage. But you still want to max out your packing space. 

The best size of backpack for the most packing space and still being allowed as a carry on is 40 liters. 

How big is a 40L backpack?

A 40L backpack measures about 22 x 14 x 8 inches (55 x 35 x 20 cm). At this size, you can use your backpack as a carry on, even on budget airlines and when flying internationally. Most airlines allow 40L bags in the overhead bin. 

The US max is 45 liters, but you might have to check that bag when you travel abroad.

A 40L travel bag will fit a week's worth of clothes, toiletries, accessories, and a computer. That's everything you need for your next big trip.