350 sq feet is the SHORT answer!
But please read below so you don't run short!
Really a great question with only another question for an answer.. Depends on how thick (viscous) the paint is, how rough the surface is, how thick a coat you want & probably a few other variables.
If we are talking a mid grade Latex paint from Home Depot, figure about 350 for "average" & if the surface is course, paint is thin or you are rolling it, those will all change the coverage.
you will need 5 cans of paint.
1 gallon of paint to cover about 350 square feet You need slightly more than a gallon if the walls are unpainted drywall, which absorbs more of the paint
21.135 gallons
It depends on the percent of solids. To simplify this, after all the liquid (solvent) part has evaporated, the pigment (solids) is what remains. One gallon of paint having 100% pigment (solids) or no solvent in it, will cover 1600 square feet at 1 mil thickness. If one gallon of paint has 50% pigment (solids) and 50% liquid (solvent), then one gallon of paint would have a net or dry film of 800 square feet.
To determine how much paint is needed to cover 100 square feet, you first need to know the coverage area of the paint you are using. This is typically indicated on the paint can as the coverage rate in square feet per gallon. Once you have this information, you can calculate the amount of paint needed by dividing the total square footage (100 sq. ft.) by the coverage rate of the paint. For example, if the coverage rate is 250 sq. ft. per gallon, you would need 0.4 gallons of paint (100 sq. ft. / 250 sq. ft. per gallon = 0.4 gallons).
An average gallon of latex house paint will cover 280 square feet
you will need 5 cans of paint.
If your drum is a 55 gallon drum and your paint can cover 400 square feet per gallon then you may cover (one coat only) a square almost 150 by 150 feet.
A gallon of paint one coat will cover about 300 square feet; if surface is very smooth about 400 sq ft,and if very rough maybe 150-200 sq feet
1 gallon of paint to cover about 350 square feet You need slightly more than a gallon if the walls are unpainted drywall, which absorbs more of the paint
For many paints, one gallon will cover 400 square feet. However, the quality of the paint can affect how much it will cover.
He covered 115 square feet per gallon. - Way below the average, which is about 280 sf per gallon.
Approximately 250 sq. feet
About 250 sq. ft.
21.135 gallons
Anywhere from 300-500 square feet depending on the thickness/thinness of the paint, how many coats you're putting on from a single can, and how large the surface is you're painting. However, 300-500 square feet is an approximate average of how much a gallon of paint should cover.
(6-ft x 172-ft) / (200 square feet per gallon) = 5.16 gallons