What ㎟ means
A square millimetre is the area of a 1 mm square.
㎟ is a Unicode compatibility character for mm², kept from East Asian typography that packed unit labels into one full-width cell.
A 2011 Japanese layout draft contrasts horizontal International System of Units notation with Japanese unit names written vertically in katakana, a Japanese script. Fonts can change ㎟'s appearance, not its meaning.
A specialist measurement sign with a legacy East Asian typesetting feel.
Don't confuse it with
1mm² mm² vs ㎟: same area unit. ㎟ is one compatibility character; mm² is the clearer spelling in technical prose.
Related characters
1
Questions people ask
1Can I write mm2 if superscripts aren't available?
Yes. Write mm2 in plain text; use mm² when superscripts are available.
More like this
9
How to type or find ㎟
- Search it as
- mm² · mm2 · sq mm
- Shows up in
- Anything that takes text · its shape is whatever your font draws
Codes and encoding1 code points
HTML decimal
㎟
HTML hex
㎟
CSS content
content: "\339F";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E3%8E%9F
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.