12 ft x 10 ft x .333 ft (4 in) = 39.96 cu ft. You need enough concrete for 40 cubic ft.
12 x 12 feet, 4 inches deep: 1.8 cubic yards, minimum.
27 cubic yards.will cover 720 square feet @ 1 foot thick
This needs more information to supply a "best" answer. A 12ft by 12ft patio gives a surface area of 16 sq.yds. A yard of concrete is a cubic yard. The number of cubic yards depends on the thickness of the slab, and the size and depth of foundations (if any). This depends on the type of soil and subsoil, and whether you have very cold winters. If you live in a warm area, 3 yards is probably about right. If you are planning to do this yourself, try asking your local building inspector for his advice.
The best way to do this is convert it all to inches. 148 inches by 143 inches. This gives you 21,164 square inches. Divide by 144 to get a total of 147 square feet.
Actually you really need to know height of the area, too since you are trying to heat or cool xxx number of cubic feet. the difference between an 8ft, 10ft, 12ft or higher ceiling will make a BIG difference.
12 ft x 10 ft x .333 ft (4 in) = 39.96 cu ft. You need enough concrete for 40 cubic ft.
125 square feet
120
120
12 x 12 feet, 4 inches deep: 1.8 cubic yards, minimum.
30
The answer depends on how big each square is.
897.662 gallons in this pond.
Bull sharks are very small there size is 10ft-12ft tall
27 cubic yards.will cover 720 square feet @ 1 foot thick
12 x 10 = 120 square feet
multiply sq inches by 0.00064516 to get sq meters example 12ft x 10ft >> 144inches x 120inches = 17280 sq inches 17280 x 0.00064516 = 11.1483648 sq meters