What is 21 feet to inches? The answer is that 21 feet equals 252 inches.
How to convert 21 feet to inches? We know that one foot is equal to 12 inches. Therefore, to convert 21 feet to inches, we multiply the foot value by 12. This gives us 21 feet × 12 = 252 inches. So, 21 feet is equal to 252 inches.
See also: How to convert 21 inches in feet.