Do I need primer?
Most modern paint has primer in it. Be sure to check the paint's page for specification information on primer.
How many coats do I need?
Generally at least two, but you might need more if you're painting over a dark wall. Our paint calculator assumes that a gallon covers 350 sq ft. using two coats of paint.
What are some average sizes?
Ceilings are commonly 10 ft. or 12 ft. high, small rooms (second bedrooms) average 10 ft. by 15 ft. and master bedrooms average 14 ft. by 18 ft.