Is a 20L backpack big enough?

SMALL BACKPACKS (< 20L) Suitable for everyday carry, tech carry, day travel, tablets… While a capacity of <20L is considered a compact size for a backpack, don't let that fool you. If the backpack is built well and is fully utilized, you should still be able to fit lots of essentials into it.



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MEDIUM BACKPACKS (20 – 35L) Suitable for school, camera, work, gym, short travel, cabin luggage … This capacity range is considered a medium-size backpack and is probably the most popular bag capacity out there.

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Yes -- I travel with a <20L bag. Just need to layer, and be comfortable washing clothes. Save money by placing 20L of stuff in your existing 26L bag. I can do 10 days in a 22 L bag with 1 small/1 medium compression cubes, after that I'd need laundry.

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MEDIUM BACKPACKS (20 – 35L) This capacity range is considered a medium-size backpack and is probably the most popular bag capacity out there. It's great for taking to school or work, depending on the styling, and can also be a great travel pack for taking on a plane.

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MEDIUM BACKPACKS (20 – 35L) This capacity range is considered a medium-size backpack and is probably the most popular bag capacity out there. It's great for taking to school or work, depending on the styling, and can also be a great travel pack for taking on a plane.

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Backpack capacity is traditionally measured in liters. Slimline bags that you can only fit your laptop and a few books into are between 10L and 16L, the most versatile packs are around 20L to 25L, and the professional camera gear and weekender bags go up to 30L and beyond.

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Their capacity lets you carry an extra layer, food and gear for day trips. 21–35 liters: This is the sweet spot for most hiking and travel daypacks. There's enough capacity to hold food, clothing and some extras, like a camera and a book.

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While personal item size restrictions vary across airlines, most airlines consider a small backpack, purse, briefcase, or laptop bag to be a personal item. These must always fit under the seat in front of you. Many airlines restrict passengers to one personal item and one carry on bag.

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Trips of 5 days or more usually call for packs of 70 liters or more. These are also usually the preferred choice for winter treks lasting more than 1 night. (Larger packs can more comfortably accommodate extra clothing, a warmer sleeping bag and a 4-season tent, which typically includes extra poles.)

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As a general rule of thumb, anything smaller than the dimensions of a carry-on can be considered a personal item. However, every airline has different restrictions for size. In most cases, your backpack should be no more than 18 x 14 x 8 inches.

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A standard large backpack ranges from 30L to 39L and is the ideal daily backpack for school, work, and everything in between. The volume of a bag this size is important for storing multiple textbooks, laptops and tablets, and a change of clothes for a long weekend.

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How much is too much? A 50-pound child should carry a maximum of 7.5 pounds. A 100-pound child should carry a maximum of 15 pounds. A 150-pound child should carry a maximum of 22.5 pounds.

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Most bags range from about 30L (1,800 cubic inches) all the way to 100L+ (6,000+ cubic inches). I recommend a backpack around 40L-50L. Personally, I wouldn't go over 65L, but some people like a bigger bag.

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