Nanometers to Micrometers
Convert nanometers to micrometers instantly — one nanometer is 0.001 micrometers.
| Nanometers | Micrometers |
|---|---|
| 1 nm | 0.001 µm |
| 2 nm | 0.002 µm |
| 3 nm | 0.003 µm |
| 5 nm | 0.005 µm |
| 10 nm | 0.01 µm |
| 25 nm | 0.025 µm |
| 50 nm | 0.05 µm |
| 100 nm | 0.1 µm |
How to use
- Enter a value in the Nanometers field.
- The Micrometers figure appears immediately — no button to press.
- Typing in the Micrometers field converts back to Nanometers the same way.
- Use the reference table for the values that come up most often.
Nanometers to Micrometers formula
The factor from nanometers to micrometers is 0.001.
µm = nm × 0.001
Put another way, one nanometer is exactly 1/1,000 of a micrometer.
Why this factor: the nanometer and the micrometer are both defined against the meter, so dividing one definition by the other gives 0.001 directly. Both definitions are set out in full below.
To go the other way, divide by 0.001 — or use the Micrometers to Nanometers converter, which is the same calculation reversed.
Worked example
Take 100 nm and multiply by the factor 0.001: the result is 0.1 µm.
100 nm × 0.001 = 0.1 µm
The converter above does this for any value you type, in either direction.
What is a nanometer?
A nanometer is one billionth of a meter — the scale of molecules and visible light wavelengths.
Definition: Exactly 1×10⁻⁹ meter by SI prefix definition.
Where it is used: Semiconductor process nodes, optical coatings, and wavelengths (visible light is roughly 380–750 nm).
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.
Nanometers vs Micrometers
The nanometer 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 nanometer?
One nanometer equals 0.001 micrometers.
What is the formula to convert nanometers to micrometers?
Multiply the number of nanometers by 0.001. To reverse it, divide by 0.001 instead.
How do I convert micrometers back to nanometers?
Divide by 0.001, which is the same as multiplying by 1000.
How many micrometers are in 10 nanometers?
10 nm works out to 0.01 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 nanometer defined?
Exactly 1×10⁻⁹ meter by SI prefix definition.