Inches to micrometers
Type a value in inches to see it in micrometers straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the inches box.
- Read the result in micrometers as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
µm = in × 25,400
Multiply the value in inches by 25,400 to get micrometers.
Example
To convert 25 in to micrometers: 25 × 25,400 = 635,000 µm.
Conversion table
| Inches (in) | Micrometers (µm) |
|---|---|
| 1 | 25,400 |
| 2 | 50,800 |
| 3 | 76,200 |
| 5 | 127,000 |
| 10 | 254,000 |
| 20 | 508,000 |
| 25 | 635,000 |
| 50 | 1,270,000 |
| 100 | 2,540,000 |
| 250 | 6,350,000 |
| 500 | 12,700,000 |
| 1,000 | 25,400,000 |
About the units
- Inch
- An inch is exactly 2.54 centimeters under the 1959 agreement, used for screens, tyres and pipes.
- Micrometer
- A micrometer (micron) is one millionth of a meter, used for hair width, filters and coating thickness.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many micrometers are in one inch?
1 in = 25,400 µm exactly.
How do I convert inches to micrometers?
Use µm = in × 25,400. For example, 25 in = 635,000 µm.
How many inches are in one micrometer?
1 µm = 0.0000393701 in.
Are the inch, foot and mile factors exact or rounded?
They are exact by definition. Since the 1959 agreement one inch is exactly 2.54 cm, one foot 0.3048 m and one mile 1609.344 m.
What is the difference between a mile and a nautical mile?
A statute mile is 1609.344 meters and is used on roads. A nautical mile is 1852 meters and is used at sea and in aviation.