There is 0.45 cubic feet in a 60-lb bag, so you need 60 bags.
If you go to 80-lb bags, there's 0.60 cubic feet and you need 45 bags.
about 60 60lb bags
27 bags of 30kg bags of concrete bargs
about 60 60lb bags
According to the FAQ on the Sakrete web site, Sixty of their sixty pound bags of High Strength concrete mix will be required to make a cubic yard of concrete.
Forty five 80 pound bags of cement are needed to make one cubic yard of concrete.
40 bags of 90 will give you 1 yard
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.
Each 60 pounds bag of ready mix concrete will make .45 cubic foot of concrete. There are 27 cubic feet in a cubic yard. You will need 60 bags of 60 pound premixed concrete to make 1 cubic yard.
20
41 bags. Actual 40.5
To determine how many bags of 80 lb concrete make a cubic yard, you need to know that one cubic yard is equivalent to 27 cubic feet. An 80 lb bag of concrete typically covers about 0.6 cubic feet. Therefore, to fill one cubic yard, you would need approximately 45 bags of 80 lb concrete (27 cubic feet ÷ 0.6 cubic feet per bag ≈ 45).
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.