What would you call "average strength" for coffee?

I have been a coffee drinker since I was 19 (now 7 years), but I still haven't observed or learned what would be the amount of water and coffee to make something what you would call "average strength"... If you can say there is a thing like that...

I know that I could probably just look it up online, but I was wondering what you, dear EF members say...