by Dirtman » Mon Oct 20, 2008 10:26 am
Length x height of each wall in feet, add 'em up. On walls with a pitched ceiling, height of one end plus height of other end, divide the answer by 2 and multiply by length.
If you're going to paint the celing, don't forget to add it in.
Keep in mind that most paints will require 2 coats.