How many cubic feet in an 80# bag of dry mixed concrete?

Question

I'm making a one foot thick pad 5' X 5' or 25 cubic feet and need to know how many 80# bags to order.

Answer 1

It should be written on the bag.

How many cubic feet in a 80 pound bag of quikrete?

In: Building and Carpentry  [Edit]

There is 2/3 cu. ft. per 80 lb. bag of pre-mixed concrete.

http://www.quikrete.com/Calculator/Main....



By my calculations it is approximately 42 bags of 80 lb.

QUANTITY CALCULATOR

You can use this quantity calculator to help you determine the number of bags of QUIKRETE® Concrete Mix, Mortar Mix, or Fast-Setting Concrete  

Enter Number of Square Feet Desired:  

For a 4" Slab:  

Number of 60# Bags:

Number of 80# Bags:

For a 6" Slab:  

Number of 60# Bags:

Number of 80# Bags:

Open Link Below

http://www.quikrete.com/Calculator/Main....

Edited

Or you can contact the company

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same link

http://www.quikrete.com/Calculator/Main....

Answer 2

This site helps calculate how many bags of the pre-mixed bags you will need to pour a slab 6" thick, which means if the slab is 6" thick then the surface area of the slab needs to be 50 sq ft. so this comes out to be:

42 - 80lb bags.