Concrete in the bulk is measured in cubic yards. Concrete on the ground is often measured by square yards, but the depth of the concrete must be known, too.
The price per cubic yard varies a lot across the US, plus not knowing the thickness of the concrete means that your question cannot reasonably be answered.
It depends how thick you want it
It depends on the depth required
of what?
Simple ... multiply square feet by cost per square foot.
2.15
Depends where you are living.
how much does concrete cost per square foot
For mudjacking, it can cost between five and eight dollars per square feet for a typical job. Mudjacking is a process that involves pumping a grout mixture under a concrete slab.
It depends how thick you want it
The square feet is a unit of area, not a unit for mass !!
It depends on the depth required
of what
of what?
Simple ... multiply square feet by cost per square foot.
2.15
If it is the same as concrete it will cover 162 square feet. concrete covers 81 square feet by 4" deep
how many cubic feet in a yard of concret