Centimetres to Nanometres Converter

This converter turns a length in centimetres into its equivalent in nanometres, a unit so small it is normally reserved for wavelengths of light, coatings, thin films and nanotechnology rather than everyday measuring, which is exactly why the jump from a familiar unit like the centimetre often catches people out. Enter any value in centimetres into the single field and the calculator instantly returns the equivalent in nanometres, worked out using the exact factor of 10,000,000 nanometres per centimetre, along with the reverse ratio showing how many centimetres make up one nanometre. Below the result you will find the underlying formula, a worked example converting 10 centimetres into 100,000,000 nanometres, and a quick-reference table running from 1 centimetre through to 100 centimetres so you can scan common values without typing them in. The conversion itself is exact, since it comes directly from the internationally agreed definitions of the metre and the inch, so any rounding you see in the displayed answer is only for readability rather than a sign of an approximation. This tool suits students working through unit conversions, tradespeople and engineers checking measurements against nanometre-scale tolerances or specifications, scientists comparing lengths across very different scales, and anyone else who needs a fast, accurate answer without doing the multiplication by hand. Simply type a number, decimal or whole, and read the converted figure straight off the results card.

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Value in centimetres (cm)

1 cm =10,000,000 nm

1 nm =1.000000e-7 cm

The formula

Multiply centimetres by 10,000,000 to get nanometres. In symbols, nm = cm × 10,000,000. To go the other way, multiply nanometres by 1.000000e-7 to get centimetres.

Worked example

Convert 10 centimetres to nanometres: 10 × 10,000,000 = 100,000,000 nanometres.

Quick reference

Centimetres	Nanometres
1 cm	10,000,000 nm
2 cm	20,000,000 nm
5 cm	50,000,000 nm
10 cm	100,000,000 nm
25 cm	250,000,000 nm
50 cm	500,000,000 nm
100 cm	1,000,000,000 nm

Frequently asked questions

How many nanometres are in one centimetre?

One centimetre equals 10,000,000 nanometres. Multiply the number of centimetres by 10,000,000 to convert.

What is the formula to convert centimetres to nanometres?

Centimetres times 10,000,000 equals nanometres. To reverse it, multiply nanometres by 1.000000e-7 to get centimetres.

Is the cm to nm conversion exact?

The factor comes from the standard definitions of the metre and the international inch (0.0254 m exactly), so the underlying conversion is exact. Displayed results are rounded for readability.

Who this converter is for

This converter is for students, tradespeople, travellers and anyone who needs to change centimetres into nanometres quickly and accurately.

What this converter assumes

You enter a length in centimetres.
The factor used is 10,000,000 nanometres per centimetre.
Results are rounded for display.

Sources

Related converters

Length Converter: convert between any length units.
Unit Converter: convert many kinds of units.
Centimetres to Metres Converter: convert centimetres to metres.
Centimetres to Kilometres Converter: convert centimetres to kilometres.

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