HTML Entity - Angstrom Sign
Angstrom Sign is a letterlike mathematical symbols representing number sets and special functions. This HTML entity enables web developers to display this character reliably across all browsers without encoding issues.
U+212B
Å
\212B
Use this HTML entity in mathematical notation for number sets like ℝ (real numbers) and ℕ (natural numbers), and physics constants.
About Angstrom Sign
The angstrom sign (Å) is a letterlike symbol used as a unit of length equal to one ten-billionth of a metre, that is, 0.1 nanometre. Its dedicated code point is U+212B, and in HTML you can write the named entity Å or the numeric forms Å and Å.
The unit is named after the Swedish physicist Anders Jonas Ångström and is widely used in chemistry, crystallography and physics to describe atomic distances, bond lengths and the wavelength of light. Because the diameter of a typical atom is on the order of a few ångström, the unit is natural for that scale.
There is an important Unicode subtlety. The dedicated angstrom sign U+212B is canonically equivalent to, and normalises to, the ordinary Latin capital letter A with ring above (U+00C5). They look identical, and comparison or normalisation can turn one into the other. For text intended as a letter, prefer U+00C5; for the unit, many style guides accept either because they are equivalent, but be aware that the two code points are not interchangeable when you are matching raw bytes.
Encoding and input: in HTML use Å or the numeric reference. On many systems you can also type the letter Å and rely on normalisation. In scientific and technical writing, always pair the number with the unit, for example "1.54 Å", and consider using the word "angstrom" where the symbol might not render.
Finally, watch for font coverage. Not every font includes the dedicated U+212B code point, but almost all include the letter Å (U+00C5), which is another reason the two are often treated interchangeably. When precision matters, test how the character renders in your target fonts.
Related Entities
Common Mistakes
Mistake: Using plain Latin letters instead of double-struck symbols for number sets
Fix: Use ℝ (ℝ), ℕ (ℕ), ℤ (ℤ), ℂ (ℂ) for number sets. Plain R, N, Z, C are ambiguous and less formal in mathematical writing.
Mistake: Confusing the aleph symbol ℵ with a Hebrew letter or a stylized N
Fix: The aleph symbol ℵ is specifically used in set theory for transfinite cardinal numbers (ℵ₀). It is not a decorative character or a substitute for the Hebrew letter.
Frequently Asked Questions
What is the HTML entity for the angstrom sign?
Use Å or the numeric forms Å and Å. They render the Å character for the unit (U+212B).
What is an angstrom?
An angstrom is a unit of length equal to 0.1 nanometre, or one ten-billionth of a metre, commonly used for atomic and molecular distances.
Is U+212B the same as the letter Å (U+00C5)?
They are canonically equivalent and look identical. U+212B is the dedicated angstrom sign; U+00C5 is the Latin letter A with ring above. Normalisation can convert one to the other.
How do I type the angstrom symbol?
In HTML use Å. On many keyboards you can type the letter Å (for example via a Nordic layout) and rely on normalisation, or paste the character directly.
Where is the angstrom used?
Mainly in chemistry, crystallography and physics, for bond lengths, atomic radii and light wavelengths.
Why does the symbol sometimes not display?
Some fonts omit the dedicated U+212B code point. Most include the visually identical letter U+00C5, so prefer a font that covers the character or use the letter form.
Angstrom Sign
Select any code to highlight it before copying.
| Unicode | U+212B |
|---|---|
| Hex Code | Å |
| HTML Code | Å |
| HTML Entity | Å |
| CSS Code | \212B |
| Windows Shortcut | |
| Mac Shortcut | |