gas tank size?

i have a 98 dodge dakota and im wonderin is there a way to find out big the gas tank is by lookin under the truck.. i know this sounds stupid but i was wonderin.. so any help is appreciated and thanks in advance

Look in the owners manual. You can do it under the truck if you want.

i would but unfortunatly it didnt have one when i bought it

how much gas does it take to fill from empty?

i havent never had it on empty but id say over 12 gallons but its lest then 20