Metres to Nanometres Converter

This converter changes a length in metres into nanometres, the tiny SI unit used to measure wavelengths of light, coatings, semiconductor features and other extremely small distances that metres describe poorly. Enter a value in metres into the single input field, and the calculator instantly returns the equivalent in nanometres, using the exact factor of 1,000,000,000 nanometres per metre, since a nanometre is defined as one billionth of a metre. Below the main result you will also see the reverse relationship, showing that 1 nanometre equals 1.000000e-9 metres, so you can think in either direction without a separate reverse converter. Further down the page, a formula section, a worked example converting 10 metres to 10,000,000,000 nanometres, and a quick-reference table covering values from 1 to 100 metres let you check the maths or find a figure at a glance. This makes the tool useful for science and physics students working with light wavelengths, engineers and technicians dealing with coatings, thin films or semiconductor measurements, and anyone who has met a nanometre figure and wants it in familiar metre terms. Because the conversion is based on a fixed SI definition rather than an estimate, the result is exact; the displayed figure is simply rounded for readability, so treat long decimal outputs as a display convenience, not a sign of imprecision.

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Value in metres (m)

1,000,000,000 nm

1 m =1,000,000,000 nm

1 nm =1.000000e-9 m

The formula

Multiply metres by 1,000,000,000 to get nanometres. In symbols, nm = m × 1,000,000,000. To go the other way, multiply nanometres by 1.000000e-9 to get metres.

Worked example

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

Quick reference

Metres	Nanometres
1 m	1,000,000,000 nm
2 m	2,000,000,000 nm
5 m	5,000,000,000 nm
10 m	10,000,000,000 nm
25 m	25,000,000,000 nm
50 m	50,000,000,000 nm
100 m	100,000,000,000 nm

Frequently asked questions

How many nanometres are in one metre?

One metre equals 1,000,000,000 nanometres. Multiply the number of metres by 1,000,000,000 to convert.

What is the formula to convert metres to nanometres?

Metres times 1,000,000,000 equals nanometres. To reverse it, multiply nanometres by 1.000000e-9 to get metres.

Is the m to nm conversion exact?

The factor comes from the SI definition of the prefix nano (10^-9), so the 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 metres into nanometres quickly and accurately.

What this converter assumes

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

Sources

Related converters

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

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