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How do you measure luggage capacity?

Cairo, Egypt
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How do you measure luggage capacity?

Hello!

I'm trying to figure out how I should translate the 'capacity in litres' of luggage into kilograms. I have a 20L-capacity backpack and I want to buy a piece of luggage that'll help me utilize my free baggage allowance (30 kg) for my next trip.

I'm guessing 1 litre doesn't equal 1 kilogram, given it doesn't make much sense that some luggage advertises having a capacity of 100 litres.

How do you measure it?

Any help would be much appreciated :)

Melbourne, Australia
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for Perth, Antarctic Adventures
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1. Re: How do you measure luggage capacity?

I have always liked the explanation here

blog.emaletas.com/luggage-capacity-in-litres

newcastle upon tyne
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2. Re: How do you measure luggage capacity?

It doesn't matter what size your bag is, its the weight of the things you put in it that's important.

a 20litre bag is pretty small, my small rucksack I carry during the day is 40litres.

Portland, Oregon
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3. Re: How do you measure luggage capacity?

I'm trying to figure out how I should translate the 'capacity in litres' of luggage into kilograms.

=====

It's called physics. One liter of water weighs one kilogram.

Of course, one liter of air weighs much less (virtually nothing).

What one liter of clothing weighs is well, what type of clothes you pack. I suspect one liter of basic shirts, vests. jeans/trousers, socks and underwear weighs a lot less than one liter of shoes.

(yes I'm an engineer)

London
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4. Re: How do you measure luggage capacity?

a 20litre bag is pretty small, my small rucksack I carry during the day is 40litres.

=============

Hah. Different strokes, etc.

The bag I take as checked luggage is 40 litres. Typically weighs 11-13kg fully packed. That includes the fact it's a backpack / wheelie combo.

Israel
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5. Re: How do you measure luggage capacity?

It's like asking which weighs more, a pound of feathers or a pound of lead!

30 kg is a huge amount of luggage. I usually take a 55-litre backpack, weighing about 9 kg. Since it's a backpack (and I'm a rather short woman), and I sometimes walk with it all day, I don't want it any heavier than that. I can't imagine why anyone would want to take 30 kg! I assume it's a wheelie suitcase and not a backpack, but even so, what are you planning on taking?! Even if you're going for three months, you don't really need more clothes and toiletries than you would take for a week.

Bingley, United...
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6. Re: How do you measure luggage capacity?

< It's like asking which weighs more, a pound of feathers or a pound of lead! >

Feathers - they have air caught in them that ups the weight.

Of course if it was on the moon...

Chicago, Illinois
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7. Re: How do you measure luggage capacity?

30kg is an incredibly large amount of stuff. I've gone on backpacking trips where I carried tents, two weeks of food, clothes, sleeping bags, a stove, cooking pot, utensils, etc., and it still did not add up to 30kg.

Madrid
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8. Re: How do you measure luggage capacity?

My gold bars reach 30kg with the bag only a quarter full.It depends on what you put in the bag.

UK
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9. Re: How do you measure luggage capacity?

Lets assume clothes weigh half that of water

So as US business traveller has explained

IKg of water has a volume of one litre.

Let science be your friend with this problem

So you want to maximise your luggage allowance at 30kgs

Therefore if clothes weigh half that of water then 1kg of clothes would have a volume of 2 litres.

Therefore you need a container with a volume of sixty litres

Simple so far

But.....

There are size restrictions

90x75x43 is quoted by British Airways as the maximum size before you pay extra.

Which is about 27 litres

So that's too small by over half

So a sixty litre bag is not for you , its way too big and expensive.

But why not do what everyone else does

Buy a regular size suitcase as above measurements

And use science to help you solve the problem

Put twice as many clothes as you could possibly need weighing no more than 30kgs including weight of case into the case.

Try to close the lid and by getting your biggest pal to sit on it.

Its a scientific fact

You can't squeeze water

But you can squeeze lots of clothes into a small space

Edited: 20 July 2014, 23:25
Cairo, Egypt
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10. Re: How do you measure luggage capacity?

Hey guys! Thank you so much for answering my question and helping me out. About why I need 30kg, I'm moving abroad for a year, with no intention of buying much over there because I'll be on a budget, and I want to bring as many things as possible without going overweight :)