The whole outside less a partial roof about a quart and half or so per coat sprayable. Better to have a little extra paint then not enough. I'm pretty funny about coverage, sucks to get one outside and realize it's a little light around the edges or down low at the rockers especially if you don't have alot of light where you're painting. Base I'll usually hit 4 coats, again a lot depends on what you're trying to cover. dark primer etc. Red, blues, violets on top of red sealer. Whites, yellows, on top of white sealer etc. and instead of fighting coverage you can just put the paint on. Paint these days the more expensive they get the less pigment they seem to have lol If you're going over mostly the same color it will take a lot less.