It will take 60 60-pound bags of ready-mix concrete to make one cubic yard of concrete. This yield is approximate and does not include allowance for uneven subgrade, waste, etc.
Ready-mix concrete is a dry mixture of Portland cement and aggregates such as sand and gravel. It can be purchased from most home improvement retailers, and is generally available in 40 to 80 pound bags. Ready-mix concrete is prepared by mixing with water. A single 60 pound bag of ready-mix concrete will require between four and seven pints of clean water, depending on the desired consistency. Caution must be used when preparing concrete as the uncured mixture is extremely caustic and may cause severe skin burns.