A linear measurement of 48 inches is equal to 4 feet. This measurement is also equal to 1 1/3 yards. In the metric system, 48 inches is equal to 121.92 centimeters or 1.22 meters.
A measurement of 12 inches is equal to 1 foot in length. An inch is abbreviated as "in." or the double prime symbol. A foot is abbreviated as "ft." or the prime symbol. For example, a height of 5 feet and 4 inches could be expressed as 5' 4".
Foot and inch measurements are units of length in the United States customary system of measurement and the imperial system.