Originally posted by: Maetryx
Depends on the density of the topsoil. Let's say it has a specific gravity of 1.0 (weighs the same as water 62.4lbs / ft^3).
62.4lbs/ft^3 * 27ft^3/cy = 1684.8 lbs/cy
1684.8lbs/cy divided by 40 lbs bags = approx. 42 bags.
If the specific gravity of the topsoil is 2.0 then = approx. 84 bags.