Convert X-unit to kilometer
Please provide values below to convert X-unit [X] to kilometer [km], or Convert kilometer to X-unit.
How to Convert X-Unit to Kilometer
1 X = 1.00208e-16 km
Example: convert 15 X to km:
15 X = 15 × 1.00208e-16 km = 1.50312e-15 km
X-Unit to Kilometer Conversion Table
| X-unit | kilometer |
|---|
X-Unit
An X-unit is a unit of length approximately equal to 1.002 x 10⁻¹³ meters.
History/Origin
The X-unit was proposed by the Swedish physicist Manne Siegbahn in 1919 for measuring the wavelengths of X-rays and gamma rays.
Current Use
The X-unit has been largely replaced by the angstrom and the picometer.
Kilometer
A kilometer is a unit of length in the metric system, equal to one thousand meters.
History/Origin
The term "kilometer" is derived from the Greek words "khilioi" (thousand) and "metron" (measure). The kilometer was first defined as part of the metric system in France in 1795.
Current Use
The kilometer is the most widely used unit of distance for road signs and travel distances in the world, with the notable exceptions of the United States and the United Kingdom.