A foot is made up of 12 inches. This measurement is standard in both the imperial system and the United States customary system.
The concept of measuring foot lengths dates back to ancient times, and it often varied slightly between cultures. However, the modern definition has been standardized to 12 inches in a foot for simplicity and uniformity.
So, whenever you need to convert feet to inches, just remember the straightforward conversion: multiply the number of feet by 12 to get the total inches. For example, if you have 3 feet, that would be 3 x 12 = 36 inches.