To convert 13.9 centimeter to inch, multiply 13.9 by the conversion factor 0.393701. The calculation is 13.9 x 0.393701 = 5.4724 inch.

13.9 centimeter equals exactly 5.4724439 inch. For most practical applications, this is commonly rounded to 5.4724 inch.

Objects measuring approximately 13.9 centimeter include the screen diagonal of an iPhone 13 mini (13.72 cm), a common utility knife (around 14.0 cm), or a compact streaming device remote control (around 13.8 cm).

Converting centimeter to inch is useful for international collaboration in engineering and manufacturing, understanding product specifications from countries using the imperial system (like the USA), and for personal reference when comparing metric measurements to familiar imperial sizes.

A simple memory aid is to recall that 1 centimeter is roughly 0.4 inch. For 13.9 cm, you can estimate by multiplying 13.9 by 0.4, yielding approximately 5.56 inches. Visually, think of a 5.5-inch smartphone screen, which is very close to 13.9 centimeter.