How many cans of paint will it take to paint the following room?

A room's dimensions are 20 feet long, 20 feet wide and 8 feet high. The room's floor, ceiling and walls all need to be painted. If a can of paint will cover 360 square feet, how many cans of paint do you need to buy if you paint the entire room twice?


How many cans of paint will it take to paint the following room?
The total square footage you need to cover is 1440: Walls= (20*8)*4=640; Floor and ceiling= (20*20)*2=800; 640+800=1440


1440/360=4. So, to paint it all twice, you would need about 8 cans of paint.How many cans of paint will it take to paint the following room?
that is 1200 square feet of wall space...the average paint is 350 to 400 feet per gallon..on smooth walls...if heavy textured it will be more like 250 square feet per gallon..the second coat will cover more than the second and use less paint..about 500 square feet..for 2 coats I would say get a 5 gallon bucket and it should do it ....It is cheaper to buy paint in the 5 gallon buckets than it is in single gallons...
You're painting the floor with the same paint? OK. It depends on the quality of the paint and how heavy handed you are. Assuming smooth walls. Maybe 3 gallons (15 litres) normal rollering, with one or two more if you are heavy handed.





The coverage guides on the cans are always very optimistic.
20 * 8 * 4 walls = 640 sq ft


so to paint it all once you need 640/360 = 1.78 cans


to paint it all twice 3.5 cans
may take 1 and one half cans. depends if you are going light over dark or same color. or if priming is involved.