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. In math mode, write \text{\AA} (amsmath). With the siunitx package, write \qty{1.54}{\angstrom} for a value with its unit, or \SI{1.54}{\angstrom} in siunitx version 2.

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.

How do I type Å in Microsoft Word?

Press Ctrl + Shift + 2 (the @ key), let go, then press Shift + A. You can also type 00C5 and press Alt + X. Both give U+00C5, the form to use for angstroms.

What is the HTML code for the angstrom symbol?

Use Å, &angst; or Å. All three produce Å as U+00C5. The separate ANGSTROM SIGN U+212B has no named entity and would be Å, but U+00C5 is the better choice.

Angstrom Symbol

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

The angstrom symbol is Å.

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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 escape

\00C5

JavaScript escape

\u00C5

LaTeX command

\AA

Windows Alt code

Alt + 0197

Mac shortcut

Option + Shift + A

Convert Angstroms

Å equals

Common Values

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Quick answer

The angstrom symbol is Å. Copy the letter Å (U+00C5), which the big button on this page gives you, rather than the separate ANGSTROM SIGN (U+212B): Unicode normalization turns U+212B into U+00C5 anyway, so search and sorting treat them as one. One angstrom is 0.1 nm, so 1.54 Å = 0.154 nm = 154 pm.

Examples

Where	How to type Å
Windows	Alt + 0197 (or Alt + 143)
Mac	Option + Shift + A
Word	Type 00C5, then press Alt + X
LaTeX text	\AA
HTML	Å or Å
Excel or Google Sheets	=UNICHAR(197)

Click Å to copy it.

Summary

The angstrom symbol (Å) is a capital A with a ring above it, used to measure lengths on the atomic scale such as bond distances, atomic radii, and wavelengths of visible light. One angstrom equals 0.1 nanometers, or 10^-10 meters. This tool gives you a one-click copy of the symbol plus every code format you might need: Unicode code point, HTML entity, LaTeX command, and the Windows Alt code, along with quick conversions to nanometers and picometers.

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: 2026-09-09 · Reviewed by Nham Vu