To work this out multiply 20,000 square feet by 1 inch.
I used the Google calculator to get the answer 47,195 litres.
I then used the google calculator to convert litres to cubic yards.
You will need 62 cubic yards of sand.
It will cover 324 sq/ft or 36 sq/yrd at 1" thick It will cover 162 sq/ft or 18 sq/yds at 2" thick It will cover 108 sq/ft or 12 sq/yds at 3" thick It will cover 81 sq/ft or 9 sq/yds at 4" thick.
It depends how thick the gravel is being laid - at 4 inches thick, a cubic yard will cover 81 square feet.
540 square feet
It would depend on how thick you want to spread it.
A square foot will cover a square foot, regardless of the depth of the material the cover is made of.
No, a duvet cover is not thick enough to do much good. Use a comforter or another blanket.
2560 sq feet 2 inches thick
You need to specify how thick you want the top soil to be
It will cover 174 square feet of area.Hope this helps
"thick paint" is very vague. what is thick to YOU may not be thick to me. It depends on the type of paint, ( latex, alkyd, enamel etc,) -it's actual viscosity, how you apply it ( brush, roller, spray etc ) and finally the smoothness of the surface. 5 gal could cover anything from 500 to 2,000 square feet. - An average household latex applied to a smooth surface with a roller will cover about 300 sq.ft. per gallon.
1 371.42857 US gallons or 5.19142188 cubic meters
1 cubic yard/(1/9 of a yard) = 9 square yards.