The question "how tall is 1" is ambiguous without a unit. However, if "1" refers to 1 foot in height, then 1 foot is equal to 12 inches or 30.48 centimeters. If the question is about the height represented by the number 1 in some other measurement unit, please specify the unit (e.g., meter, inch) for a precise answer. To summarize:
- 1 foot = 12 inches = 30.48 centimeters
