How much concrete for a 10 ft by 10 ft by 3 inch slab?

To calculate the volume of concrete needed for a 10 ft by 10 ft slab that is 3 inches thick, first convert the thickness to feet: 3 inches is 0.25 feet. The volume is then calculated using the formula: Volume = length × width × height. Therefore, the volume is 10 ft × 10 ft × 0.25 ft = 25 cubic feet.