Conversion For Sq. Ft To Yards Of Concrete

 
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Old 02-06-2008, 04:41 PM   #1
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Conversion For Sq. Ft To Yards Of Concrete


how do you figure your yardage for concrete in an area...
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Old 02-06-2008, 04:49 PM   #2
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Re: Conversion For Sq. Ft To Yards Of Concrete


Area = length x width
Volume = length x width x height (or depth of concrete)

To convert cubic feet to cubic yards, divide by 27.

One yard = 3 feet

3'x3'x3' = 27 cubic feet =1 cubic yard.

Now, having said all that, if this is the first time you're ordering concrete, you might want to get someone with some experience in to help and double check your numbers.

You don't work concrete, it works you. Plus, it never forgets... Sorta like a wife.

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Old 02-06-2008, 04:50 PM   #3
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Re: Conversion For Sq. Ft To Yards Of Concrete


SSSSSh!Come closer, it's a secret!
(Fourth grade math. Keep it under your hat!)
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Old 02-06-2008, 04:53 PM   #4
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Re: Conversion For Sq. Ft To Yards Of Concrete


AAAAh!
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Old 02-06-2008, 05:03 PM   #5
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Re: Conversion For Sq. Ft To Yards Of Concrete


Quote:
Originally Posted by Double-A View Post
Area = length x width
Volume = length x width x height (or depth of concrete)

To convert cubic feet to cubic yards, divide by 27.

One yard = 3 feet

3'x3'x3' = 27 cubic feet =1 cubic yard.

Now, having said all that, if this is the first time you're ordering concrete, you might want to get someone with some experience in to help and double check your numbers.

You don't work concrete, it works you. Plus, it never forgets... Sorta like a wife.


ive ordered and poured myself before, but its been a while.

ive got a gargae addition and ive got the exreience to pour the job myself, i just cant remember


so....an area 25 long ft x 30 wide ft x 6 inches deep is 16.6 yards of crete? that seems like a bit much
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Old 02-06-2008, 05:07 PM   #6
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Re: Conversion For Sq. Ft To Yards Of Concrete


25x30=750 sq'
750/2=375 cu' ('caus its 6" deep div by 2)
375/27=13.88 yds

call it 14 1/2 'caus I like extra



How'd you get 16.6?
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Old 02-06-2008, 05:08 PM   #7
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Re: Conversion For Sq. Ft To Yards Of Concrete


25' x 30' x 6" (1/2 foot) is 375 cubic feet.

divided by 27 is 13.88888 cubic yards, so order about 15 yards since you grades may not be exact. - Mkae sure you have sidewalk or something else poured so you have a place to put the excess. They usually do not like to take concrete back.
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Old 02-06-2008, 05:13 PM   #8
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Re: Conversion For Sq. Ft To Yards Of Concrete


Quote:
Originally Posted by Forry View Post
25x30=750 sq'
750/2=375 cu' ('caus its 6" deep div by 2)
375/27=13.88 yds

call it 14 1/2 'caus I like extra



How'd you get 16.6?

i followed this formula
Area = length 30 x width 25 =750
Volume = length 30 x width 25 x height .6 =450 / 27 = 16.6

Last edited by shazamyman; 02-06-2008 at 05:17 PM.
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Old 02-06-2008, 05:15 PM   #9
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Re: Conversion For Sq. Ft To Yards Of Concrete


Quote:
Originally Posted by neolitic View Post
AAAAh!
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Old 02-06-2008, 05:17 PM   #10
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Re: Conversion For Sq. Ft To Yards Of Concrete


Quote:
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Old 02-06-2008, 06:29 PM   #11
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Re: Conversion For Sq. Ft To Yards Of Concrete


Height is 0.5 not 0.6
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Old 02-06-2008, 06:54 PM   #12
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Re: Conversion For Sq. Ft To Yards Of Concrete


Now...who knows how many meters are needed...
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Old 02-06-2008, 07:02 PM   #13
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Re: Conversion For Sq. Ft To Yards Of Concrete


Quote:
Originally Posted by reveivl View Post
Height is 0.5 not 0.6

irealized that earlier, so what would it be if it were four incehs?

i have to ask you to excuse me, i have a ninth grade education, but ive got 15 years hands on experience, and 2 years independent contractors experience, ive only done 2 pours on my own and they were small porches...
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Old 02-06-2008, 07:02 PM   #14
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Re: Conversion For Sq. Ft To Yards Of Concrete


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Now...who knows how many meters are needed...


now my brains startin to hurt
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Old 02-06-2008, 07:05 PM   #15
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Re: Conversion For Sq. Ft To Yards Of Concrete


My ninth grader is doing calculus (that I can't do), but the answer is to divide the little number by the big number, i.e. 4 divided by 12 = .33
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Old 02-06-2008, 07:15 PM   #16
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Re: Conversion For Sq. Ft To Yards Of Concrete


For all practical purposes:
1"=.08
2"=.17
3"=.25
4"=.33
5"=.42
6"=.5
7"=.58
8"=.67
9"=.75
10"=.83
11"=.92
12"=1
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Old 02-06-2008, 07:58 PM   #17
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Re: Conversion For Sq. Ft To Yards Of Concrete


Neo, did you do that all by yourself? Or did you ask T's 9th grader for a formula? Just razzin'.

Revievl's right, 6" is half a foot (a foot is 12", so half that is, well .5). Easy mistake to make. Got a friend who uses a slide rule kinda thingie her concrete guy gave her... put in length x width x depth and you get the right order off the thing, but I like doing it the "hard" way.

For a 4" slab do length x width x (neo table). Divide by 27 than add some, round up, or add more if you're not sure of the grading. My concrete provider will take it back if I order too much, but they charge me for it 'cause it's junk if it's not used.
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Old 02-06-2008, 08:25 PM   #18
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Re: Conversion For Sq. Ft To Yards Of Concrete


Quote:
Originally Posted by Forry View Post
Neo, did you do that all by yourself? Or did you ask T's 9th grader for a formula? Just razzin'.
Long ago,
In a galaxy far far away.....
I was a field engineer,
i.e. building layout and
site work.
Dimensions and grades are all
in feet, 10ths, and 100ths.
Stuff is engraved in the
lizard brain. Handy when doing math
with measurements to the 8th!
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Old 02-06-2008, 08:27 PM   #19
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Re: Conversion For Sq. Ft To Yards Of Concrete


Sure 'nuff
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Old 02-06-2008, 08:33 PM   #20
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Re: Conversion For Sq. Ft To Yards Of Concrete


There are calculators online like this one: http://www.concretenetwork.com/concr...calculator.htm

Makes things easy to the exact decimal. Footings also.

Now, when I am roughing out an estimate, we figure 80 square feet of concrete to the cubic yard if it is a 4 inch slab....60 sq/ft for 6 inch slabs.

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