# Angstrom to nm Converter URL: https://speedycalculator.com/calculators/conversion/angstrom-to-nm/ Last updated: 2026-10-25 > Convert ångströms (Å) to nanometres (nm): 1 ångström = 0.1 nm, so multiply by 0.1 or divide by 10. Both fields are editable, so you can also type in nanometres and get ångströms back. ## Inputs - Ångströms (Å) ## Results - Nanometres ## Formula ``` 1 Å = 0.1 nm 1 nm = 10 Å nm = Å × 0.1 ``` ## Explanation 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 ÅngströmsNanometresNanometresÅngströms0.5 Å0.05 nm1 nm10 Å1 Å0.1 nm2 nm20 Å1.54 Å0.154 nm5 nm50 Å5 Å0.5 nm10 nm100 Å10 Å1 nm20 nm200 Å100 Å10 nm50 nm500 Å1,000 Å100 nm100 nm1,000 Å5,000 Å500 nm1,000 nm10,000 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). ## Worked example Inputs — Ångströms: 10 Å. Results — **Nanometres = 1 nm**. ## FAQ **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. ## Sources - [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811) - [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)