square feet to cubic yards

need 6" x 400sf = height in square feet x square feet divided by 1 cubic yard

= (.5 X 400)/27

= 7.40741 cubic yards

4.0 cubic feet is how big in square feet?

one square feet t= how much cubic feet

[JohnS]

Originally Posted by Unregistered

one square feet t= how much cubic feet

An area has no volume because it has no thickness, so zero.

An area times a height or thickness is a volume.

Originally Posted by Unregistered

You need a thickness measurement as well ie square is 2 measurements, cube is 3

since 1 cubic yard = 27 cubic feet ( 3'x3'x3')

Let's say you are using sand 12" thick over 800 square feet,
You'll need a common denominator so 12" = 1 foot thick

1X800 = 800 cubic feet/ 27 cubic feet(feet in a cubic yard)
= 29.62 cubic yards at 1 foot thick

if it's 1" thick.. it's 29.62x1/12 (since 1 " is 1/12th of a foot)
= 2.47 cu yds

if it's 4" thick.. it's29.62 x 4/12 (4/12=.333) so it's 29.62 x .333
= 9.86 cu yds

Now.. if you're using topsoil... for under sod or for a garden factor in compression. add about 15%

(Good Answer!)

I have 3,692 square feet to cover with Mulch, about 2 inches thick. Can you tell me how many cubic yards of mulch to purchase?

[Robert Fogt]

Originally Posted by BillNJ

I have 3,692 square feet to cover with Mulch, about 2 inches thick. Can you tell me how many cubic yards of mulch to purchase?

3692 square feet * (2 inches / 12) feet = 615.33 cubic feet

615.33 cubic feet / 27 cubic feet/cubic yard = 22.8 cubic yard

You need about 23 yards of mulch. Order 10%-20% extra if you care that it compacts, probably not since its mulch.

Originally Posted by Unregistered

want to convert square feet to cubic yard

5.873 sq ft

My landscaper has given me an estimate for xeriscaping 3500 SQUARE FEET of my lawn. I'm going for a s,all rock at about one inch covering. The rock quarry (my rock supplier)has given me an estimate in CUBIC YARDS. I know that 3x3x3 is a cubic yard, so do I divide the3500 Sq. feet by 27 cubic yards in order to determine how much rock I will actually need and the cost? The cost is $27 a cubic yard. Pls. help

[JohnS]

Originally Posted by tiffinaec

My landscaper has given me an estimate for xeriscaping 3500 SQUARE FEET of my lawn. I'm going for a s,all rock at about one inch covering. The rock quarry (my rock supplier)has given me an estimate in CUBIC YARDS. I know that 3x3x3 is a cubic yard, so do I divide the3500 Sq. feet by 27 cubic yards in order to determine how much rock I will actually need and the cost? The cost is $27 a cubic yard. Pls. help

I don't know if 1" thickness is enough, but it is 1/12 ft, so you need 292 ft³.
At 27 ft³/yd³, you need 11 yd³. As the rock is delivered loose, and will compact, I'd add another 15% or so, and suggest 13 yd³.