Convert 100 cm to um

How to convert centimeters to micrometers

1. Formula: micrometers = centimeters × 10,000
2. Put in the value: 100 centimeters.
3. Result: 1,000,000 micrometers.

Centimeters to micrometers table

Converting the other way: micrometers to centimeters

centimeters = micrometers × 0.0001. So 1,000,000 micrometers is back to 100 centimeters; one micrometer is 0.0001 centimeters. See the micrometers to centimeters table.

Quick estimate in your head

For a rough answer, multiply by about 10000: 100 × 10000 ≈ 1,000,000 um, against the exact 1,000,000 um (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 centimeter is bigger than a micrometer, so the number of micrometers must come out larger than the number of centimeters. If your answer goes the other way, divide instead of multiplying.

About the units

Centimeter (cm) and micrometer (um) are both units of length. One centimeter equals 10,000 micrometers, and one micrometer equals 0.0001 centimeters. 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 centimeters in other units

The most readable unit for this amount is meters (1).

• 1,000 mm
• 1 m
• 0.001 km
• 39.370079 in
• 3.28084 ft
• 1.093613 yd
• 0.00062137 mi
• 0.00053996 nmi
• 0.54680665 fm
• 1,000,000 um

How this answer was calculated

The result is worked out from the numbers in this page's address when the page is opened, using exact arithmetic wherever possible and rounding only for display. Nothing is copied from a printed table. If you think an answer is wrong, please tell us through the contact page and we will check it.

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