Foot (ft)
Imperial unit of length, equal to 12 inches.
Definition
A foot is a unit of length in the imperial system, commonly used in the US, equal to 12 inches or 0.3048 meters.
Example
A doorway may be 7 feet tall.
Calculation
Foot (ft)=12 inches
7 feet = 7 × 12 inches = 84 inches.