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To calculate the number of 80-pound bags of Sandkrete needed for a 15 x 15 slab that is 4 inches thick, first determine the volume of the slab in cubic feet. The volume is calculated as: ( 15 , \text{ft} \times 15 , \text{ft} \times \frac{4}{12} , \text{ft} = 75 , \text{cubic feet} ). An 80-pound bag of concrete typically covers about 0.6 cubic feet, so you would need approximately ( \frac{75}{0.6} \approx 125 ) bags.

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2mo ago

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If your talking about 4'x4'x4" thick it will take about 12 bags. Most 60# bags will do .45 cubic feet and that slab would be about 5.3 cubic feet wich equals 11.77 bags.. Mike


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Related Questions

How many 60 pound bags of concrete to do a 4x4x4 inches thick?

If your talking about 4'x4'x4" thick it will take about 12 bags. Most 60# bags will do .45 cubic feet and that slab would be about 5.3 cubic feet wich equals 11.77 bags.. Mike


How much quikrete to pour a 4'x6'x4 thick slab?

To calculate the amount of Quikrete needed for a 4' x 6' slab that is 4 inches thick, first convert the dimensions to feet: the thickness is 4 inches, which is 1/3 of a foot. The volume is then calculated as 4' x 6' x (1/3)' = 8 cubic feet. Quikrete typically comes in 60-pound or 80-pound bags, with 60-pound bags covering about 0.45 cubic feet and 80-pound bags covering about 0.6 cubic feet. Therefore, you would need approximately 18 bags of 60-pound Quikrete or 14 bags of 80-pound Quikrete to complete the slab.


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