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How do you figure yards of concrete. Want to pour a pad 10x20

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How do you figure yards of concrete. Want to pour a pad 10x20 3 1/2 inches thick. How would I figure how many yards I need

Hello there and welcome to Just Answer. My name is XXXXX XXXXX I will be assisting you today. I am an engineer with over 30 years of electrical and electronic training, repair and installation experience. I will try and answer your question accurately and precisely so that we can get you on your way.

Now..a yard of concrete is a cube 36" x 36" x 36".

So, you have (in inches) a slab that is 120" x 240" x 3.5"

Therefore you need (120x240x3.5) divided by 36x36x36 which is just over 2 yards (2.16 yards). If you order 2.5 yards, you can get almost 4" of thickness.

Let me know if you need further information.



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