How do I determine how many cubic yards are in 800 square feet.
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square feet to cubic yards
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Re: square feet to cubic yards
There are 81 square feet to a cubic yard, providing the depth is one foot.
The typical formula for conversion is (Length in Feet X Width in Feet X Depth in Feet) / 27 = CY.
Example: 100' (L) X 200' (W) X 6" (D)
= 20000 X .5
= 10000 SF / 27 = 370.37 CY
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Re: square feet to cubic yards
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%
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Re: square feet to cubic yards
Originally posted by UnregisteredI need 6 inches depth over 400 square feet
you would need 200 cubic feet to cover that area
or aprox. 7 and a half cubic yards
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Re: square feet to cubic yards
what difference does it makes sense if it works and thsis does every time I tried it several times, and if you have square feet instead of square yards you just eliminate the step of multiplying by nine, remembering 324 is much easier than remembering a different number for each depth of concrete, I do this about 70 times a month for lettings and this is going to make my life much easier.
I Thank YOU
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