1 foot = 12 inch =0.3048 m, 1 yard =3 ft =0.9 144 m, 1 mile = 1760 yard =1
Extended data:
The word "inch" comes from the old English word "ynce", which comes from the Latin word "uncia" (meaning "one twelfth"). /kloc-In the 4th century, King Edward II of England promulgated the "standard legal inch". Its regulation is: choose three largest grains from the middle of barley ears, and the length from head to head is one inch.
In liquid crystal displays, the specifications are generally 17 inch, 19 inch, 23 inch, 27 inch and so on. In mobile phones, the screen sizes are generally 4.0 inches, 4.2 inches, 4.5 inches, 4.7 inches, 4.8 inches, 5.0 inches, 5.2 inches, 5.5 inches, 5.7 inches and 6.44 inches.
In tablet computers, the screen sizes are generally 7.9 inches, 9.7 inches and 12.9 inches. The size of the display screen is measured by the diagonal length in inches.