An ångström is 10⁻¹⁰ m, one tenth of a nanometre. Crystallographers and chemists quote bond lengths and lattice spacings in ångströms; spectroscopists prefer nanometres.
How to use the Angstrom to nm Converter
- Type the number of ångströms into the Ångströms field. Decimals such as 5 are fine.
- Read the answer in Nanometres – it updates as you type, with no button to press.
- To convert the other way, type into Nanometres and the ångströms are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only Å ⇄ nm. Need a different unit? Use the general length converter, where you can choose any “from” and “to” unit.
How it works
Both units measure length, so they are always in the same ratio: one ångström equals 0.1 nanometres. The calculator multiplies the number of ångströms you type by 0.1 to give nanometres, and when you type into the nanometres field it divides by the same factor to give ångströms. Because the ratio never changes, doubling the ångströms always doubles the nanometres. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).
How to convert ångströms to nanometres
- Write down the value in ångströms, for example 10 Å.
- Multiply by the conversion factor 0.1 (because 1 ångström = 0.1 nm).
- 10 × 0.1 = 1 nm.
- To go back from nanometres to ångströms, divide by 0.1 – or multiply by 10.
Å to nm conversion table
| Ångströms | Nanometres | Nanometres | Ångströms |
|---|---|---|---|
| 0.5 Å | 0.05 nm | 1 nm | 10 Å |
| 1 Å | 0.1 nm | 2 nm | 20 Å |
| 1.54 Å | 0.154 nm | 5 nm | 50 Å |
| 5 Å | 0.5 nm | 10 nm | 100 Å |
| 10 Å | 1 nm | 20 nm | 200 Å |
| 100 Å | 10 nm | 50 nm | 500 Å |
| 1,000 Å | 100 nm | 100 nm | 1,000 Å |
| 5,000 Å | 500 nm | 1,000 nm | 10,000 Å |
What is a ångström?
The ångström (Å) is 10⁻¹⁰ m, named after the Swedish physicist Anders Ångström. It is convenient for atomic radii, chemical bond lengths and crystal lattice spacings.
What is a nanometre?
A nanometre is one billionth of a metre. Wavelengths of light (visible light is roughly 380–750 nm), semiconductor features and molecules are measured in nanometres.
Common mistakes to avoid
Mixing the international foot (0.3048 m) with the old u.s. survey foot, confusing nautical and statute miles, and writing decimal feet such as 5.5 ft as “5 ft 5 in” (it is 5 ft 6 in).
Formula
1 Å = 0.1 nm1 nm = 10 Ånm = Å × 0.1Worked example
Inputs — Ångströms: 10 Å.
Results — Nanometres = 1 nm.
Frequently asked questions
How many ångströms in a nanometre?
10 Å.
How long is a carbon–carbon bond?
About 1.54 Å (0.154 nm).
How do I convert ångströms to nanometres?
Multiply the number of ångströms by 0.1. For example, 10 Å × 0.1 = 1 nm.
How do I convert nanometres back to ångströms?
Divide by 0.1 (or multiply by 10), or simply type the value into the nanometres field above.
What is 100 Å in nanometres?
100 Å = 10 nm.
What is 5 Å in nanometres?
5 Å = 0.5 nm.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between ångströms and nanometres. To pick any length unit, use the general length converter linked under Related calculators.
What formula does the Angstrom to nm Converter use?
1 Å = 0.1 nm.