So… I am looking for a spacious backpack..
And I am left confused by how capacity is labelled…
Isn't it simple L x W x D in cm each = [Vol] in cc = ([Vol in cc]/1000) in litres?
Take thie Kmart backpack for e.g.
https://www.kmart.com.au/product/45l-medium-hiking-pack-4306…
It is advertised as a 45L backpack.
The dimensions are :
53cm (H) x 32cm (W) x 20cm (D) = 33,920 cc ~ 34 Litres.
How is this a 45 Litres backpack ? Do I have something wrong in my mathematic fundamentals or it's just marketing (that 10 Litres for the straps and what not?)
It's meant to be measured by what can actually be fit inside, which includes a bit of bulge space inevitably. But often it'll be under the quoted spec.