Website comparing airline carry-on dimensions

I did a Google search using the words "airline carry on size comparison" and found many examples, none of them complete, often mixing and matching inches with centimeters. There are many other ways to search for this concept which appear at the end of the first results page. These are the ones I bookmarked for me. If you see one you recognize here or elsewhere, please post it. I, for one, am interested in this topic, too.

Here we go:

http://www.worldtraveler.com/international-carry-on-size

http://www.skyscanner.net/news/cabin-luggage-guide-hand-baggage-sizes-and-weight-restrictions

http://wikitravel.org/en/Airline_baggage

http://www.travelsmith.com/wcsstore/images/TravelSmith/email/LuggageGuidelines.pdf

http://www.farecompare.com/about/worldwide-baggage-fee-chart/#/

Any of those might be handy if you're shopping for luggage, but reconfirm details with your air carrier if booking a ticket, since details are always subject to change.

Airfare Watchdog has a comparison chart that they usually keep up to date:

[www.airfarewatchdog.com/blog/10460865/airline-carry-on-bag-policies.html]

The first link by Lo, WorldTraveler.com shows the allowable weight for SAS as 8 kg/18 # and for Lufthansa as 8 kg (but nowhere is 17 # mentioned on the Lufthansa website. (Note: 8 kg = 17.6 #). So if you are flying SAS, how do they decide which weight limit applies to whom? Do the Americans get 8.18 kg (18 #) while the European can only take 8 kg?

Lee's query: "Do the Americans get 8.18 kg (18 #) while the European can only take 8 kg?" reminds me of the mathematician-engineer joke.

A mathematician, an engineer, and a physicist were taking a math class together. One day the mathematician and the physicist decided to play a joke on the engineer. They told him that the pretty girl sitting at the back of the room said he could get close to her every time they ringed the bell, but he could only travel half the distance from him to her. So they started ringing the bell and the engineer would travel half the distance, and the mathematician and the physicist were making fun of him. They thought it was really funny. When the engineer was 1/16 the original distance they asked him, “why are you doing this? You do know you are never going to get there right?” And the engineer replied, “I will get close enough for practical purposes.”

Where's the lawyer? Every a ... and a ... and a ... joke must include a lawyer ("who says I'll sue all of you").

Yes, Lee, Americans do get the 18 lbs. It says so on the SAS website:

www.flysas.com/en/us/travel-info/baggage/cabin-baggage

I'm guessing the airline is not run by engineers who need to be precise but by business people who show a little leeway.

It's like those who believe the maximum measurements of soft-sided bags are rigid measurements no matter how they're packed.