Convert Micrometers to Nanometers
1 micrometer is 1,000 nm. One micrometer is exactly 1000 nanometers.
One micrometer is 1000 nanometers. To convert micrometers to nanometers, multiply by 1000; to go the other way, divide by 1000 or multiply by 0.001. The factor is exact rather than rounded: it follows from NIST. A millionth of a meter, still widely called a micron.
Factor checked against the defining standard · How we check
- Micrometers × 1000
1 * 10001,000 nm
1 micrometer in every length unit
| Unit | Value | Exact factor |
|---|---|---|
| inches | 0.00003937007874 in | × 0.0000393700787402 |
| feet | 0.000003280839895 ft | × 0.00000328083989501 |
| yards | 0.000001093613298 yd | × 0.00000109361329834 |
| miles | 0.0000000006213711922 mi | × 0.000000000621371192237 |
| millimeters | 0.001 mm | × 0.001 |
| decimetres | 0.00001 dm | × 0.00001 |
| centimeters | 0.0001 cm | × 0.0001 |
| meters | 0.000001 m | × 0.000001 |
| kilometers | 0.000000001 km | × 0.000000001 |
| nautical miles | 0.0000000005399568035 nmi | × 0.000000000539956803456 |
| micrometers (as entered) | 1 µm | — |
| nanometers | 1,000 nm | × 1,000 |
| thou | 0.03937007874 thou | × 0.0393700787402 |
Factors are entered by hand from NIST rather than derived from a units library, so the ones that terminate are exact rather than rounded.
The same converter answers this pair however it is written: micrometres to nanometres is the British spelling of the same units — the metre and the litre are spelled that way outside the United States and the quantity does not change.
How do you convert micrometers to nanometers? The converter and the working
- 1.Take the measurement in micrometers.
- 2.Multiply by 1000 — that is how many nanometers fit in one micrometer.
- 3.To go back the other way, divide by 1000, or multiply by 0.001.
Worked example: 25 micrometers to nanometers
- Formula
- µm × 1000 = nm
- Arithmetic
- 25 × 1000 = 25,000 nm
- Answer
- 25 µm = 25,000 nm
The factor is exact, so this figure is exact too — only the display is rounded.
Micrometers to nanometers conversion table
| Micrometers | Nanometers |
|---|---|
| 1 µm | 1,000 nm |
| 2 µm | 2,000 nm |
| 3 µm | 3,000 nm |
| 4 µm | 4,000 nm |
| 5 µm | 5,000 nm |
| 6 µm | 6,000 nm |
| 7 µm | 7,000 nm |
| 8 µm | 8,000 nm |
| 9 µm | 9,000 nm |
| 10 µm | 10,000 nm |
| 12 µm | 12,000 nm |
| 15 µm | 15,000 nm |
| 20 µm | 20,000 nm |
| 25 µm | 25,000 nm |
| 50 µm | 50,000 nm |
| 100 µm | 100,000 nm |
| 200 µm | 200,000 nm |
| 300 µm | 300,000 nm |
| 500 µm | 500,000 nm |
| 1000 µm | 1,000,000 nm |
| 2000 µm | 2,000,000 nm |
| 5000 µm | 5,000,000 nm |
| 10000 µm | 10,000,000 nm |
What is a micrometer?
A millionth of a meter, still widely called a micron. Machining tolerances, filter ratings and cell diameters are all quoted here.
What is a nanometer?
A billionth of a meter. Visible light runs from about 380 to 750 nm, and a semiconductor process node is named after one even though it stopped describing a physical dimension years ago.
How many nanometers are in a micrometer?
One micrometer is 1000 nanometers, exactly. Going the other way, one nanometer is 0.001 micrometers. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every length unit here
The whole group — 13 units with their symbols and the size of each one in meters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a micrometer.
Source: NIST — international yard and pound agreement (inch = 25.4 mm exactly)
Cite this page
- APA
- Rule Calculator. (2026). Convert Micrometers to nanometers. Rule Calculator. https://rulecalculators.com/convert/micrometer-to-nanometer
- MLA
- "Convert Micrometers to nanometers." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/micrometer-to-nanometer.
- Chicago
- Rule Calculator. "Convert Micrometers to nanometers." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/micrometer-to-nanometer.
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Questions people actually ask
- How many nanometers are in a micrometer?
- 1000. A billionth of a meter. Visible light runs from about 380 to 750 nm, and a semiconductor process node is named after one even though it stopped describing a physical dimension years ago.
- How do I convert nanometers back to micrometers?
- Divide by 1000, or multiply by 0.001 — they are the same operation.
Other length conversions
Nanometers to micrometers — the same conversion the other way.