There are 1 000 000 000 (one billion) micrometers in a kilometer. To convert from kilometers to micrometers, multiply the kilometer value by 1 billion.
1 Kilometer = 1 000 000 000 Micrometers
Kilometer is a metric length unit and equals to 1000 meters. The abbreviation is "km".
Micrometer is a metric length unit and usually used for precise measurement of small distances in engineering and machining. The abbreviation is "µm".