

Convert Kilometers to Micrometers (km to µm) ▶ Conversion Table
How to convert1 micrometer (µm) = 0.000000001 kilometer (km). Micrometer (µm) is a unit of Length used in Metric system. Kilometer (km) is a unit of Length used in Metric system. Micrometer: A Unit of LengthDefinition of the micrometerThe micrometer, also known as the micron, is a unit of length in the International System of Units (SI) that equals one millionth of a meter. Its symbol is µm. History of the micrometerThe term micron and the symbol µ were officially accepted for use in isolation to denote the micrometer in 1879, but officially revoked by the International System of Units (SI) in 1967. This became necessary because the older usage was incompatible with the official adoption of the unit prefix micro, denoted µ, during the creation of the SI in 1960. In the SI, the systematic name micrometre became the official name of the unit, and µm became the official unit symbol. How to convert micrometerThe micrometer can be converted to other units of length using simple multiplication or division by powers of 10. For example, one micrometer is equal to 0.001 millimeters, 0.000001 meters, or 0.000000001 kilometers in the SI system. One micrometer is also equal to 0.000039 inches, 0.0000033 feet, or 0.00000062 miles in the US standard system. Where micrometer is usedThe micrometer is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria, and for grading wool by the diameter of the fibers. The width of a single human hair ranges from approximately 20 to 200 µm The micrometer is used in different countries and applications for various purposes. For example:
Example conversions of micrometer to other unitsHere are some sample conversions of micrometer to other units:
Kilometer  Unit of Distance / LengthUnit Symbol/Abbreviation: km Where the unit used in the World: The kilometer is used as a unit used to measure distances or lengths. Definition of the Unit: The kilometer (kilometre in UK spelling) is a unit of length/distance in the metric system (SI Unit system) equivalent to one thousand meters. 1 km is equivalent to 0.62137 miles. History of the Unit: Although the meter was defined in 1799 in France, the kilometer was first adopted for everyday use by the Dutch in 1817 under local name of the mijl. The myriametre (10000 meters) and "lieues de Poste" (Postal leagues, 4288 meters) were preferred to the "kilometer" for everyday use in France in 19th century. In the mid 19th century the kilometer was already in everyday use in the Italy and in Netherlands and the myriametre was still in use in France. The CIPM (The International Committee for Weights and Measures) officially abolished the prefix "myria" and the "myriametre" in 1935, leaving the kilometer as the recognised unit of length instead of myriametre. Where it's used: The kilometer is commonly used on road signs to indicate the distance to travel to a given location, on maps to indicate scale, for odometer indication in automotive industry. It is also the most popular unit for describing the distance between geographical points and locations. Equivalents in other units and scales:
1 km is equivalent to 0.621371 mi. Español Russian Français 
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