Length and Area
cmtonm
Convert centimetres (cm) to nanometres (nm).
Factor1 cm = 1e+7 nm
Converter
cm
Accepts numbers or expressions, e.g. 150 + 14.7
Result
nm
Rendered to 6 significant figures.
Formula
Formula
nm = cm × 1e+7
Multiply any value in centimetres by 1e+7 to obtain the value in nanometres.
Worked example
Convert 1 cm to nm.
- 01Start with 1 cm.
- 02Multiply by the conversion factor: 1 × 1e+7 = 1e+7 nm.
Result1 cm = 1e+7 nm
Conversion table
| cm | nm |
|---|---|
| 1 | 1e+7 |
| 2 | 2e+7 |
| 5 | 5e+7 |
| 10 | 1e+8 |
| 20 | 2e+8 |
| 50 | 5e+8 |
| 100 | 1e+9 |
| 200 | 2e+9 |
| 500 | 5e+9 |
| 1000 | 1e+10 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from cm to nm?
1 cm equals 1e+7 nm. To convert, multiply the value in centimetres by 1e+7.
How do I convert 1 cm to nm?
1 cm = 1e+7 nm. For any value, multiply by 1e+7.
How do I convert nm back to cm?
Divide by the same factor — or equivalently, multiply by 1e-7. So 1 nm = 1e-7 cm.
When would I need to convert centimetre 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 cm and nm are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).