Convert 100 um to km

How to convert micrometers to kilometers

1. Formula: kilometers = micrometers × 1e-9
2. Put in the value: 100 micrometers.
3. Result: 1e-7 kilometers.

Micrometers to kilometers table

Converting the other way: kilometers to micrometers

micrometers = kilometers × 1,000,000,000. So 1e-7 kilometers is back to 100 micrometers; one kilometer is 1,000,000,000 micrometers. See the kilometers to micrometers table.

Quick estimate in your head

For a rough answer, multiply by about 1e-9: 100 × 1e-9 ≈ 1e-7 km, against the exact 1e-7 km (0.0% out). Good enough to check that a calculated result is sensible.

Common mistakes

The usual slip is using the factor the wrong way round. A micrometer is smaller than a kilometer, so the number of kilometers must come out smaller than the number of micrometers. If your answer goes the other way, divide instead of multiplying.

About the units

Micrometer (um) and kilometer (km) are both units of length. One micrometer equals 1e-9 kilometers, and one kilometer equals 1,000,000,000 micrometers. Results on this page are rounded for display; the conversion itself uses the exact definitions.

Length conversions come up in DIY and building plans, running and cycling distances, maps, clothing sizes and travel between countries that use metric and imperial units.

100 micrometers in other units

The most readable unit for this amount is micrometers (100).

• 0.1 mm
• 0.01 cm
• 0.0001 m
• 1e-7 km
• 0.00393701 in
• 0.00032808 ft
• 0.00010936 yd
• 6.213712e-8 mi
• 5.399568e-8 nmi
• 0.00005468 fm