How to Convert Micrometres to Metres (µm to m)
Length conversions come up when reading overseas furniture specs, cycling the Round Island Route in kilometres while a foreign app shows miles, or checking marine distances in the Singapore Strait in nautical miles. This guide shows how to convert micrometres into metres by hand, with examples and a quick-reference table.
The conversion
To convert micrometres to metres, multiply the value by 1.000000e-06. To go the other way, divide by the same number (or multiply by 1,000,000). Because the factor is tiny, scientific notation keeps the numbers manageable.
Metres = micrometres × 1.000000e-06
Worked examples
- 3 µm = 3.000000e-6 m
- 12.5 µm = 1.250000e-5 m
- 75 µm = 7.500000e-5 m
Micrometres to Metres table
| Micrometres | Metres |
|---|---|
| 1 µm | 1.000000e-6 m |
| 2 µm | 2.000000e-6 m |
| 5 µm | 5.000000e-6 m |
| 10 µm | 1.000000e-5 m |
| 20 µm | 2.000000e-5 m |
| 25 µm | 2.500000e-5 m |
| 50 µm | 5.000000e-5 m |
| 100 µm | 1.000000e-4 m |
| 250 µm | 0.00025 m |
| 500 µm | 0.0005 m |
| 1,000 µm | 0.001 m |
Common questions
Is µm to m exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Metres to Micrometres converter.
Mistakes to avoid
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Background
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For any value, use the Micrometres to Metres Converter or browse all length converters.
Run your own numbers: Micrometres to Metres Converter