What ∱ means
It marks integration in a clockwise direction. For an integral along a directed path, reversing the path reverses the sign.
A contour is a closed path. is the clockwise contour integral sign, used for integration around one.
Technical notation; without its surrounding formula, you cannot tell what is being integrated.
Don't confuse it with
2
Related characters
1
Questions people ask
1Why does ∱ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
More like this
10
How to type or find ∱
- Search it as
- clockwise integral symbol · cwint · clockwise contour integral · integral direction
- Shows up in
- Anything that takes text · its shape is whatever your font draws
Windows (Word)
Windows
HTML
∱CSS
\2231Word
In Word, type 2231, then press AltX.
Linux
Press CtrlShiftU, type 2231, then press Enter.
Mobile
As of 2026, ordinary phone keyboards rarely expose it; use a Unicode-capable keyboard or input app.
Codes and encoding1 code points
HTML decimal
∱
HTML hex
∱
CSS content
content: "\2231";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%88%B1
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.