Centimeters to Micrometers
An instant centimeters-to-micrometers converter, with the formula and a reference table below.
| Centimeters | Micrometers |
|---|---|
| 1 cm | 10000 µm |
| 2 cm | 20000 µm |
| 3 cm | 30000 µm |
| 5 cm | 50000 µm |
| 10 cm | 100000 µm |
| 25 cm | 250000 µm |
| 50 cm | 500000 µm |
| 100 cm | 1000000 µm |
How to use
- Enter a value in the Centimeters field.
- The Micrometers figure appears immediately — no button to press.
- Typing in the Micrometers field converts back to Centimeters the same way.
- Use the reference table for the values that come up most often.
Centimeters to Micrometers formula
The factor from centimeters to micrometers is 10000.
µm = cm × 10000
Put another way, one centimeter is exactly 10,000 micrometers.
Why this factor: the centimeter and the micrometer are both defined against the meter, so dividing one definition by the other gives 10000 directly. Both definitions are set out in full below.
To go the other way, divide by 10000 — or use the Micrometers to Centimeters converter, which is the same calculation reversed.
Worked example
Given 12 cm, multiplying by 10000 yields 120000 µm.
12 cm × 10000 = 120000 µm
The converter above does this for any value you type, in either direction.
What is a centimeter?
A centimeter is one hundredth of a meter, the everyday metric unit for body and object measurements.
Definition: Exactly 0.01 meter by SI prefix definition.
Where it is used: Height, clothing sizes, rainfall, paper and screen dimensions across the metric world.
What is a micrometer?
A micrometer, or micron, is one millionth of a meter — the scale of cells, fibers and semiconductor features.
Definition: Exactly 1×10⁻⁶ meter by SI prefix definition. Symbol µm.
Where it is used: Filtration ratings, particulate sizes (PM2.5 is 2.5 µm), fiber diameters, optical wavelengths.
Worth knowing: Often written 'micron' in industry. A human hair is roughly 70 µm across.
Centimeters vs Micrometers
The centimeter and the micrometer belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many micrometers are in a centimeter?
One centimeter equals 10000 micrometers.
What is the formula to convert centimeters to micrometers?
Multiply the number of centimeters by 10000. To reverse it, divide by 10000 instead.
How do I convert micrometers back to centimeters?
Divide by 10000, which is the same as multiplying by 0.0001.
How many micrometers are in 10 centimeters?
10 cm works out to 100000 µm.
Is there anything to watch out for with micrometers?
Often written 'micron' in industry. A human hair is roughly 70 µm across.
How is the centimeter defined?
Exactly 0.01 meter by SI prefix definition.