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Angstroms to Nanometers Converter
↔ Convert nm to Å instead

Common Conversions

Å nm
0.5 0.05
0.96 0.096
1 0.1
1.2 0.12
1.54 0.154
2 0.2
5 0.5
10 1
100 10
1000 100
4000 400
7000 700

Why this conversion matters in chemistry

Ångströms and nanometers both live at the molecular scale, just a factor of 10 apart. Crystallography tends to stick with ångströms because bond lengths and lattice spacings land around 1 to 5 Å, which reads more naturally than 0.1 to 0.5 nm. Electron microscopy and most modern nanomaterials work use nanometers because their features often run into the tens or hundreds. The conversion is a divide by 10, which is the easiest decimal move in the business. The only real mental work is remembering which unit your source used in the first place — papers don't always label them as carefully as they should.

Formula

nm = Å / 10

Worked Examples

1.54 Å = 0.154 nm

The carbon–carbon single bond length. Probably the single most-referenced distance in organic chemistry.

5893 Å = 589.3 nm

The sodium D-line — the yellow emission that gives sodium flame tests their color and low-pressure sodium streetlights their characteristic yellow cast.

0.96 Å = 0.096 nm

The O–H bond length in water. Short even by molecular standards — oxygen pulls hydrogen in tight.

3.56 Å = 0.356 nm

The lattice constant of diamond. Sets the spacing you'd see in any X-ray diffraction pattern of a diamond crystal.

Frequently Asked Questions

How do I convert ångströms to nanometers?
Divide by 10. So 1.54 Å becomes 0.154 nm, and 5893 Å becomes 589.3 nm. The factor is exact — 1 ångström is defined as 10⁻¹⁰ m, 1 nm as 10⁻⁹ m.
Why convert between them at all?
Because two communities use two different conventions. Crystallography and a lot of older spectroscopy work in ångströms; SI-aligned modern journals and nanoscale materials work prefer nanometers. Being fluent both directions is just what reading across the field requires.
Which unit is better for bond lengths?
Ångströms give you cleaner numbers — bonds fall in the 1 to 3 Å range, where decimal handling stays simple. In nanometers the same bonds are 0.1 to 0.3 nm, which feels awkwardly small. That said, nanotech literature has shifted toward nm, so both are entirely acceptable. Use whichever matches the paper you're writing against.
How do ångströms and nanometers relate to picometers?
1 Å = 100 pm = 0.1 nm. Picometers are the strictly SI way to report atomic-scale distances, and you'll sometimes see them in modern structural literature. A C–C bond is 154 pm, 1.54 Å, or 0.154 nm — all three write the same distance, just with different decimal placements.