1 kilometer (km) = 1,000,000,000 micrometers (µm). To convert, multiply by 1,000,000,000: µm = km × 1,000,000,000. For example, 5 km = 5,000,000,000 µm.
µm = km × 1,000,000,000
Kilometers to micrometers table
| Kilometers (km) | Micrometers (µm) |
|---|---|
| 1 | 1,000,000,000 |
| 2 | 2,000,000,000 |
| 3 | 3,000,000,000 |
| 4 | 4,000,000,000 |
| 5 | 5,000,000,000 |
| 10 | 10,000,000,000 |
| 20 | 20,000,000,000 |
| 25 | 25,000,000,000 |
| 50 | 50,000,000,000 |
| 100 | 100,000,000,000 |
| 250 | 250,000,000,000 |
| 500 | 500,000,000,000 |
| 1,000 | 1,000,000,000,000 |
The two units
Kilometer (km). One thousand meters.
Micrometer (µm). One millionth of a meter, also called a micron.
Because both units are defined in terms of the same base unit, the factor 1,000,000,000 is exact, not a rounded measurement.
Convert kilometers to other units
- Kilometers to meters — 1 km = 1,000 m
- Kilometers to centimeters — 1 km = 100,000 cm
- Kilometers to millimeters — 1 km = 1,000,000 mm
- Kilometers to nanometers — 1 km = 1,000,000,000,000 nm
- Kilometers to miles — 1 km = 0.6213711922 mi
- Kilometers to yards — 1 km = 1,093.613298 yd
- Kilometers to feet — 1 km = 3,280.839895 ft
- Kilometers to inches — 1 km = 39,370.07874 in
- Kilometers to nautical miles — 1 km = 0.5399568035 nmi
Convert other units to micrometers
Questions people ask
- How many micrometers are in a kilometer?
- 1,000,000,000, exactly.
- How do you convert kilometers to micrometers?
- µm = km × 1,000,000,000. It is the same as dividing by 1e-9.
- How do you convert micrometers back to kilometers?
- km = µm ÷ 1,000,000,000. See micrometers to kilometers.
Results use the legal definitions of each unit and are checked against the Pint unit library. Display rounds to 10 significant digits. All unit conversions · More tools
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