How do figure out how many yards of concrete are needed for a Job?
Question:
Answers:
Mearure the length and width in ft. of the area you want to
concrete. This will give you the area in square foot. Depending on the thickness (use ft), multiply the area by the thickness to get the volume in cubic feet. For example, if you are to concrete an 8ft by 6ft lot, with concrete 4 in thick,
lot area = 8 X 6 = 48 sq. ft.
thickness = 4 in = 4/12 ft = 1/3 ft, so
volume = area X thickness = 48 X 1/3 = 16 cu. ft.
To get cubic yard, divide by 3X3X3=27 (1cu.yd=27cu.ft)
so 16cu. ft = 16/27 = .59 ~ 0.6 cu. yd.
based on 3 inch thick slab (no deep footings)
A 10 foot x 10 foot area would be 1 yard
All you have to do is know the area of the pad/sidewalk/etc (length x width) and the thickness you want to make it and call the concrete company. They'll take care of the rest.
Sometimes you might have a 36" deep, 18" round hole and the math can get a bit harder.
I believe most companies would rather they decide how much you need so they don't have problems with someone who ordered twice what they need and wants to refuse taking it, for example.
vlee1225 got it right on the money
length x width x thickness divided by 27 (be sure to convert inches to tenths)Example: 15'-6 1/2" = 15.5416 or say the thickness is say 8" it would be .6667
vlee1225. How do you know, until you are old?
This may help you http://www.concretenetwork.com/concrete/...
multiply length times width =square feet divide by 9 = square yards,9 square feet equals 1 yard.
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