* Know the conversion: There are 12 inches in 1 foot.

* Calculate for whole feet: 4 feet * 12 inches/foot = 48 inches

* Calculate for half a foot: 0.5 feet * 12 inches/foot = 6 inches

* Add the results: 48 inches + 6 inches = 54 inches

Answer: There are 54 inches in 4 and a half feet.