fsymbols
🔍
Loading symbols…
››
𝑼

mathematical bold italic capital u

Mathematical Bold Italic Capital U

124/996

𝑼 is a mathematical U whose bold italic style can distinguish variables. Its formula supplies the meaning; compatibility normalization can reduce it to plain U.

Text symbol

What 𝑼 means

Its bold italic style distinguishes one mathematical U from another.

This math bold italic U can distinguish a variable, but it names no fixed quantity; the formula defines what U represents.

In 1999, mathematical publishers proposed complete styled alphabets because losing a style could change an equation's meaning. The proposal expanded older, isolated letter symbols, preserving distinctions in plain text.

Math notation; the formula supplies the meaning.

Part of the collection

𝐁
Bold Letters (Bold Text)
Explore 269 more →

Don't confuse it with

4
U
Latin Capital Letter U
Plain Latin capital U. The bold-italic copy is a styled letter that reads identically and breaks text search.
Ս
Armenian Capital Letter Seh
Looks like Latin U in many fonts and is a known spoofing letter in web addresses.
𝑈
Mathematical Italic Capital U
Math italic capital U. Same shape in a lighter weight, often copied from maths or social-media text.
Ｕ
Fullwidth Latin Capital Letter U
Looks like U but is a separate character from East Asian input.

Questions people ask

1

Why did 𝑼 turn into plain U?

A compatibility-normalizing system can map it to U. Specifically, NFKC removes this mathematical style distinction; keep the character or express its style in mathematical markup when the distinction matters.

Collections with 𝑼

1
𝐼Italic Letters (Italic Text)211 symbols

How to type or find 𝑼

Search it as
bold italic u · math bold u · bold u symbol · unicode bold u
Shows up in
Anything that takes text · its shape is whatever your font draws
Windows (Word)
⎇Alt+XType 1D47C, then AltX to get 𝑼.
Windows
⊞Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win .).
macOS
⌃Control+⌘Command+␣SpaceOpen the character viewer and search “mathematical bold italic capital u”.
Linux
⎈Ctrl+⇧Shift+UType 1d47c, then Enter or Space.
HTML
𝑼
CSS
\1D47C
HTML code for bold italic U
In HTML, write 𝑼 where the character should appear.
Codes and encoding1 code points
HTML decimal
𝑼
HTML hex
𝑼
CSS content
content: "\1D47C";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%F0%9D%91%BC
1
On screen
1
Code points
2
JS .length
4
UTF-8 bytes

A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

Families this belongs to

2

Letters1,265 symbols

µʹـ℀℁ℂ℃℄℅℆ℇ℈

Fancy letters996 symbols

𝐀𝐁𝐂𝐃𝐄𝐅𝐆𝐇𝐈𝐉𝐊𝐋