There are exactly 2.54 CM in an inch.
For every inch there are 2.54 CM.
So to figure out how many CM are in a foot you would take 2.54 and multiply it by 12 inches to get your answer.
So if you multiply 2.54 CM by 12 you would get the answer of 30.48.
So in 1 foot there are 30.48 CM.
In 2 feet there are 60.96 CM
In 3 feet there are 91.44 CM and in 4 feet there are 121.98 CM
You can use any calculator to multiply the amount of centimeters in each feet by entering 30.48 CM for 1 foot and multiply it by the number of feet you're measuring to get the exact amount CM.