Exactly 1.8. I don't suppose you even looked at your question before posting it!
18 centimeters is 18 centimeters.
18 centimeters = 1.8 decimeters
18 inches = 45.72 centimeters
Eighteen inches, which is equivalent to 45.72 centimeters, is bigger than 40 centimeters.
1.8 decimeters is the same as 18 centimeters
700 centimeters.
22 inches is 55.88 centimeters.
18 millimeters = 1.8 centimeters
There are 548.64 centimeters in 18 feet. 18 feet x 30.48 centimeters/1 foot = 548.64 centimeters 1 foot = 30.48 centimeters
18 centimeters=7.08661417 inches
91 inches is equivalent to 231.14 centimeters.
1,800 centimeters = 18 meters