oldgoat378 wrote:This has probably been answered a million times but it wasn't asked by me! I have 1000 square feet of area 3" deep. How many "yards" of concrete would it take to fill it and how do I do this Math? And what what does the term "yards" mean?

Answering the questions in reverse order:

1)

Yards in the case of concrete means square yards of concrete. A cube of concrete one yard wide, one yard long, and one yard tall. A yard is three feet, so that would make a 3 foot by three foot by three foot cube, with a total of 3x3x3 = 27 square feet.

2)

In order to do any type of math, you have to be talking in the same units. You've got 1,000 square feet of area, but three inches of depth. We need to convert inches to feet before we can continue.

There are twelve inches to the foot, and you're depth is three inches, so:

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`3 in `

-------- = 0.25 Ft

12 In/Ft

3)

Having gotten to the same units, we can proceed with the math. With 1,000 FtÂ² of area by 0.25 ft thick you have:

1,000 FtÂ² x 0.25 ft = 250 FtÂ³.

Since step one showed us there are 27 cubic feet in one cubic yard...

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`250 FtÂ³ `

----------- = 9.259 YdÂ³

27 FtÂ³/YdÂ³

You'll need 9.259 cubic yards of concrete. Best to order 10, just to be sure, It's always easier to throw it away, then scramble to get more while the stuff you've already poured is setting up.

William J. Knight

Health Physicist

Los Alamos National Labs