about 71 cubic metres of gravel i think
218.75 cubic feet or 8.1 cubic yards
2800 feet of gravel
it depends how thickly you lay it.
Gravel is bought in cubic quantities, or by weight. You ask "to fill" but you only give a square measure. The volume of gravel required wil depends on the depth you wish the gravel to be. To fill 81 square metres to a depth of 5 cm would require 4.05 cubic metres of material.
about 71 cubic metres of gravel i think
218.75 cubic feet or 8.1 cubic yards
2800 feet of gravel
Volume required = pi*r2*h = pi*32*16 = 452.4 cubic feet
it depends how thickly you lay it.
Gravel is bought in cubic quantities, or by weight. You ask "to fill" but you only give a square measure. The volume of gravel required wil depends on the depth you wish the gravel to be. To fill 81 square metres to a depth of 5 cm would require 4.05 cubic metres of material.
It depends how deep you go. If you do 2 inches deep the area will require at least 0.7 cubic yards (about 1,710 pounds) of gravel.
It depends how deep you want the gravel to cover, if you want it to be 2 inches deep it's going to cost more than 5 inches. Also it depends how big the gravel is cut, I think that the smaller the gravel is the more it costs.
You will need 65.93 cubic yards or 84.6 tons of gravel.
Approximately 24.7 cubic yards or 31.7 tons of gravel.
You'll need about 28.704 cubic yards (37 tons) of gravel.
5.55 cubic yards of gravel