U need 1.63 80lb bags per square ft so 131bags to do 8ft by 8ft
16
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go to any search. and type in concrete calculater
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 many bags of cement for a pad 4x7x4 inches thick
Forty five 80 pound bags of cement are needed to make one cubic yard of concrete.
It's 54, 60lbs bagsand 40.5 80lbs bags.Check http://www.decks.com/calculators/concrete.aspx Answer54in construction a yard of concrete is not in cubic yards. A yard of concrete (in bulk) cost about $75 (Alabama) and is 4 inchs thick. Most Sidewalks, driveways and platforms are only 4 inch thick.So 1 80lbs back covers a little over 1 square foot at 4 inches thick.
go to any search. and type in concrete calculater
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 many bags of cement for a pad 4x7x4 inches thick
20
To make one yard of concrete from 80# bags you will need about 40-45 bags. Each bag is about .67 or 2/3 cubic foot. you will need 27 cubic feet to make 1 cubic yard. Cheaper to have a redimix truck deliver, and a lot less work.
According to the related link below; the required amount to cover 1 square yard with 4 inches of concrete is 6.6 60 pounds bags.
The answer will depend on how large and area you want the topping for. Without that information, no sensible answer is possible.
Usually concrete mix comes in 40, 60 or 80 pound bags.
You need 1.16tonne. You need to know the weight of a bag of concrete and then divide 1.16 by that weight and that will give you the answer you need.
This cannot be answered without knowing the width and depth.
18 bags (80 pounds) of quikrete for a 4 inch thick slab.
Forty five 80 pound bags of cement are needed to make one cubic yard of concrete.