How to Convert Nanometres to Centimetres (nm to cm)
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 nanometres into centimetres by hand, with examples and a quick-reference table.
The conversion
To convert nanometres to centimetres, multiply the value by 1.000000e-07. To go the other way, divide by the same number (or multiply by 10,000,000). Because the factor is tiny, scientific notation keeps the numbers manageable.
Centimetres = nanometres × 1.000000e-07
Worked examples
- 3 nm = 3.000000e-7 cm
- 12.5 nm = 1.250000e-6 cm
- 75 nm = 7.500000e-6 cm
Nanometres to Centimetres table
| Nanometres | Centimetres |
|---|---|
| 1 nm | 1.000000e-7 cm |
| 2 nm | 2.000000e-7 cm |
| 5 nm | 5.000000e-7 cm |
| 10 nm | 1.000000e-6 cm |
| 20 nm | 2.000000e-6 cm |
| 25 nm | 2.500000e-6 cm |
| 50 nm | 5.000000e-6 cm |
| 100 nm | 1.000000e-5 cm |
| 250 nm | 2.500000e-5 cm |
| 500 nm | 5.000000e-5 cm |
| 1,000 nm | 0.0001 cm |
Common questions
Is nm to cm 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 Centimetres to Nanometres converter.
Mistakes to avoid
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
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.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Background
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
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.
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 Nanometres to Centimetres Converter or browse all length converters.
Run your own numbers: Nanometres to Centimetres Converter