What is the angstrom symbol?

The angstrom symbol is Å, a capital letter A with a ring above it. It represents the angstrom, a unit of length equal to 10^-10 meters, named after physicist Anders Jonas Ångström.

How do I type the angstrom symbol on a keyboard?

On Windows, hold Alt and type 0197 on the numeric keypad. On Mac, press Option+Shift+A. You can also copy it directly from this page.

Is there a difference between Å (A with ring) and the angstrom sign?

Unicode defines both: U+00C5 LATIN CAPITAL LETTER A WITH RING ABOVE and U+212B ANGSTROM SIGN. The ANGSTROM SIGN is a legacy compatibility character that normalizes to U+00C5, so most fonts render them identically. Using U+00C5 is recommended for new text.

What is the LaTeX command for the angstrom symbol?

In text mode, use \AA, which renders as Å. The siunitx package also provides \si{\angstrom} for use with numeric values in math mode.

How many nanometers is one angstrom?

One angstrom equals 0.1 nanometers, or 100 picometers. A typical atomic radius is roughly 1 to 2 angstroms.

Why is the angstrom used instead of nanometers in chemistry?

Angstroms keep bond lengths and atomic radii as whole numbers close to 1 to 3, which is easier to read and compare than the equivalent nanometer values of 0.1 to 0.3.

Angstrom Symbol

Name: Angstrom Symbol
Availability: InStock
Author: Nham Vu

Click the angstrom symbol (Å) to copy it, or copy its Unicode, HTML entity, LaTeX, and Alt code formats.

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Latin capital A with ring above (U+00C5)

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Codes & Formats

Unicode code point

U+00C5

HTML entity (named)

HTML entity (numeric)

CSS / JS escape

\00C5

LaTeX command

\AA

Windows Alt code

Alt + 0197

Mac shortcut

Option + Shift + A

Convert Angstroms

Å equals

Common Values

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Summary

Click the angstrom symbol (Å) to copy it, or copy its Unicode, HTML entity, LaTeX, and Alt code formats.

How it works

Click the large Å symbol to copy it to your clipboard.
Pick a code format (Unicode, HTML, LaTeX, Alt code) and click its copy button.
Enter a value in angstroms to see the equivalent in nanometers and picometers.
Paste the copied symbol or code into your document, spreadsheet, or code editor.

Use cases

Label bond lengths or atomic radii in a chemistry or crystallography document.
Write wavelengths of light, such as 5500 Å for visible green light.
Add the Unicode or HTML entity code to a web page or LaTeX paper.
Type the angstrom symbol on a device where the ring-above accent key is not available.
Convert a measurement in angstroms to nanometers or picometers for a lab report.
Reference the difference between the letter A-with-ring and the dedicated angstrom sign character.

Frequently Asked Questions

Last updated: 2026-07-22 · Reviewed by Nham Vu