Look on the paint tin.
Different paints have different coverage which also depends on the surface being painted: its porosity, preparation and so on.
It depends on the paint, and the surface that you are painting - including its preparation.
About 8 liters for a smooth to semi smooth surface
Paint coverage depends on the type of paint (acrylic, alkyd, enamel, latex, etc.), the texture and absorbency of the surface to be painted, and the type of application (brush, roller, or spray). A first coat of paint usually requires more paint than a second or third coat because it reduces absorbency by making the surface smoother. Most paint manufacturers specify coverage for their paint to be somewhere around 8.6 square meters per liter, so it would probably take about 1.5 liters to cover 12.15 meters with a single coat.
2200/400 = 5.5 cans
It depends on the paint. It should say on the can how much it will cover.
4 l of paint will cover about 34.5 m²
It depends on the paint, and the surface that you are painting - including its preparation.
It depends how thickly you apply the paint ! Paint cans usually have a label stating a typical area that the contents will cover.
That depends on how thick you paint, and how many layers of paint you use.
A gallon of paint will cover about 300 square feetof wall area. So it will depend on the surface you are painting but in general square 5 gallons will cover approximately 1500square feet. Some manufacturers stretch ... If you can't decide between 4 or 5 gallons, go with 5 and buy it in a 5-gallon container. It should actually be cheaper than three 1-gallon cans, and you're guaranteed the colors will be the same.
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.
About 400 litres.
About 105 square feet or 9.75 square meters on a smooth surface with no waste at 4 mil thickness
About 8 liters for a smooth to semi smooth surface
You must have your figures wrong. - 4 litres of paint will not even come close to covering 100 metres square! !
The answer depends on the type of paint: different paints have different coverage. It also depends on the nature of the surface that is being painted and its preparation. The paint container will give an indication of the likely coverage.
Single coat ,100sqft Double coat 50sqft