Nanometers to km Converter (nm to km)

How to convert nanometers to kilometers

Formulakm = nm × 1×10⁻¹²

Multiply the value in nanometers by 1×10⁻¹². To go the other way, multiply by 1,000,000,000,000 (or divide by 1×10⁻¹²).

A nanometer is smaller than a kilometer: it takes 1,000,000,000,000 nanometers to make one kilometer.

Worked examples

1 nanometer1 nm × 1×10⁻¹² = 1×10⁻¹² km
5 nanometers5 nm × 1×10⁻¹² = 5×10⁻¹² km
10 nanometers10 nm × 1×10⁻¹² = 1×10⁻¹¹ km
20 nanometers20 nm × 1×10⁻¹² = 2×10⁻¹¹ km
100 nanometers100 nm × 1×10⁻¹² = 1×10⁻¹⁰ km

Nanometers to kilometers conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Nanometers to kilometers: 0.1–10 nm
Nanometers (nm)	Kilometers (km)
0.1 nm	1×10⁻¹³ km
0.25 nm	2.5×10⁻¹³ km
0.5 nm	5×10⁻¹³ km
1 nm	1×10⁻¹² km
2 nm	2×10⁻¹² km
3 nm	3×10⁻¹² km
4 nm	4×10⁻¹² km
5 nm	5×10⁻¹² km
6 nm	6×10⁻¹² km
7 nm	7×10⁻¹² km
8 nm	8×10⁻¹² km
9 nm	9×10⁻¹² km
10 nm	1×10⁻¹¹ km

Nanometers to kilometers: 12–1,000 nm
Nanometers (nm)	Kilometers (km)
12 nm	1.2×10⁻¹¹ km
15 nm	1.5×10⁻¹¹ km
20 nm	2×10⁻¹¹ km
25 nm	2.5×10⁻¹¹ km
30 nm	3×10⁻¹¹ km
40 nm	4×10⁻¹¹ km
50 nm	5×10⁻¹¹ km
75 nm	7.5×10⁻¹¹ km
100 nm	1×10⁻¹⁰ km
250 nm	2.5×10⁻¹⁰ km
500 nm	5×10⁻¹⁰ km
1,000 nm	1×10⁻⁹ km

About the units

Nanometer (nm)

One billionth of a metre. Visible light wavelengths run from about 380 to 750 nm, and semiconductor process nodes are named in nanometres. One nanometer equals 1×10⁻⁹ meters (m).

Kilometer (km)

One thousand metres. Kilometres measure road distances and running races in most countries; a 10K race is 10 km, about 6.2 miles. One kilometer equals 1,000 meters (m).

Frequently asked questions

How many kilometers are in one nanometer?

There are 1×10⁻¹² kilometers in one nanometer, and this value is exact by definition.

How do I convert nanometers to kilometers?

Multiply the number of nanometers by 1×10⁻¹². For example, 10 nm × 1×10⁻¹² = 1×10⁻¹¹ km.

How many nanometers are in one kilometer?

One kilometer equals 1,000,000,000,000 nanometers. That is the reverse factor, 1 ÷ 1×10⁻¹².

What is 10 nanometers in kilometers?

10 nm = 1×10⁻¹¹ km.

Is this nm to km converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

Nanometers to km Converter