Convert micrometer to nanometer
Convert micrometer to nanometer instantly. 1 µm = 1,000 nm. Formula, worked examples and a quick reference table.
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One micrometer equals 1,000 nanometers. To convert any number of micrometers to nanometers, multiply by 1,000.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Length conversions come up wherever a measurement crosses a border: a height given in feet and inches on a form that wants centimetres, a running distance recorded in kilometres and compared against miles, a component specified in millimetres and ordered from a supplier working in inches. The conversions themselves are exact — the inch, foot, yard and mile have all been defined in metric terms since 1959 — so any discrepancy comes from rounding, not from the units disagreeing.
micrometer to nanometer formula
To go the other way, use micrometer = nanometer ÷ 1,000.
About these units
The micrometre, or micron, is a millionth of a metre. It is the scale of bacteria, fine dust and semiconductor features, and the unit particulate air-quality limits are quoted in.
The nanometre is a billionth of a metre — the scale of individual molecules and of visible light, whose wavelengths run from about 380 to 700 nm.
Micrometer is also written micrometre, micrometres, micrometers, micron, microns and um. Nanometer is also written nanometre, nanometres and nanometers.
Sources
micrometer to nanometer conversion table
| Micrometer | Nanometer |
|---|---|
| 1 µm | 1,000 nm |
| 2 µm | 2,000 nm |
| 3 µm | 3,000 nm |
| 5 µm | 5,000 nm |
| 10 µm | 10,000 nm |
| 20 µm | 20,000 nm |
| 25 µm | 25,000 nm |
| 50 µm | 50,000 nm |
| 100 µm | 100,000 nm |
| 250 µm | 250,000 nm |
| 500 µm | 500,000 nm |
| 1,000 µm | 1,000,000 nm |
Frequently asked questions
How many nanometers are in a micrometer? +
There are 1,000 nanometers in one micrometer.
What is 10 µm in nm? +
10 µm equals 10,000 nm. Multiply 10 by 1,000.
How do I convert nanometer back to micrometer? +
Use micrometer = nanometer ÷ 1,000. The converter above handles both directions, or see our dedicated nanometer to micrometer page.
How accurate is this micrometer to nanometer conversion? +
The factor used is 1,000, carried at full double precision. Where a unit has an exact legal definition the factor is exact rather than approximate. Rounding is applied only to the displayed result, so the answer is never a calculation done on an already-rounded number.
Is there a quick way to estimate µm to nm in my head? +
Multiply by 1,000. That matches the true factor of 1,000 exactly, so no adjustment is needed for a mental estimate.