How do you find out how many square feet a bag of concrete will cover if you want a slab that is 6inches thick and concrete is sold in cubed yards?

Question

phi · Answer

change cubic yards to cubic feet
3 ft / yard
cube everything:  (3 ft)^3/yard^3  or 27 ft^3 per yard^2
change 6 inches to feet:   0.5  feet  (1/2 of a foot)
volume is length*width*height  or L*W*H
L*W is area (in square feet), so that is what you are looking for.  call L*W= A (for area)
so A*H is the volume.  H= 0.5 ft
A*0.5= 27 ft^3
A= 54 ft^2

anonymous · Answer

thanks!