This web site has a calculator to determine how many cu yards and tons one needs of limestone "traffic bond". http://www.rwmillerandsons.com/prod04.htm
Using that calculator (and changing numbers until I got 1 ton) the calculator says I would need .66 cu yards.
It depends on how deep it is.
5 cubic feet
0.619 cubic yards.
1 cubic meter is 1.308 cubic yards.
440,740.741 cubic yards.
There are approximately 1.30795 cubic yards in a cubic meter.
11 cubic yards
That is approximately 16.741 cubic yards
40 cubic feet = 1.481 cubic yards.
2,000 cubic feet = 74.07 cubic yards.
1.308 cubic yards = 35.316 cubic foot
34,438 cubic meters = 45,043.2 cubic yards.