Millimetres to Nanometres Converter

Convert millimetres (mm) to nanometres (nm) instantly. Enter a value in millimetres and this converter returns the equivalent in nanometres, using the exact factor of 1,000,000. One millimetre is 1,000,000 nanometres, and one nanometre is 0.000001 millimetres, so you can convert either way. The factor follows the standard definitions of the metre and the international inch, so it is consistent and reliable for school work, trade, engineering, travel and everyday measuring. The formula, a worked example and a quick-reference table are below.

Value in millimetres (mm)

1 mm =1,000,000 nm

1 nm =0.000001 mm

The formula

Multiply millimetres by 1,000,000 to get nanometres. In symbols, nm = mm × 1,000,000. To go the other way, multiply nanometres by 0.000001 to get millimetres.

Worked example

Convert 10 millimetres to nanometres: 10 × 1,000,000 = 10,000,000 nanometres.

Quick reference

Millimetres	Nanometres
1 mm	1,000,000 nm
2 mm	2,000,000 nm
5 mm	5,000,000 nm
10 mm	10,000,000 nm
25 mm	25,000,000 nm
50 mm	50,000,000 nm
100 mm	100,000,000 nm

Frequently asked questions

How many nanometres are in one millimetre?

One millimetre equals 1,000,000 nanometres. Multiply the number of millimetres by 1,000,000 to convert.

What is the formula to convert millimetres to nanometres?

Millimetres times 1,000,000 equals nanometres. To reverse it, multiply nanometres by 0.000001 to get millimetres.

Is the mm 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 millimetres into nanometres quickly and accurately.

What this converter assumes

You enter a length in millimetres.
The factor used is 1,000,000 nanometres per millimetre.
Results are rounded for display.

Sources

Related converters

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

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