Length and Area
mmtonm
Convert millimetres (mm) to nanometres (nm).
Factor1 mm = 1000000 nm
Converter
mm
Accepts numbers or expressions, e.g. 150 + 14.7
Result
nm
Rendered to 6 significant figures.
Formula
Formula
nm = mm × 1000000
Multiply any value in millimetres by 1000000 to obtain the value in nanometres.
Worked example
Convert 1 mm to nm.
- 01Start with 1 mm.
- 02Multiply by the conversion factor: 1 × 1000000 = 1.00000e+6 nm.
Result1 mm = 1.00000e+6 nm
Conversion table
| mm | nm |
|---|---|
| 1 | 1.0000e+6 |
| 2 | 2.0000e+6 |
| 5 | 5.0000e+6 |
| 10 | 1e+7 |
| 20 | 2e+7 |
| 50 | 5e+7 |
| 100 | 1e+8 |
| 200 | 2e+8 |
| 500 | 5e+8 |
| 1000 | 1e+9 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mm to nm?
1 mm equals 1000000 nm. To convert, multiply the value in millimetres by 1000000.
How do I convert 1 mm to nm?
1 mm = 1.00000e+6 nm. For any value, multiply by 1000000.
How do I convert nm back to mm?
Divide by the same factor — or equivalently, multiply by 1e-6. So 1 nm = 1e-6 mm.
When would I need to convert millimetre to nanometre?
Length conversions appear in piping, layout, and mechanical drawings — particularly when reconciling imperial fittings or instrument lengths with metric plant drawings.
Is the conversion exact?
Yes. Both mm and nm are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).