What ㏊ means
It marks a hectare with the Latin abbreviation “ha”.
Chinese, Japanese, and Korean text often uses cells one character wide. The box lets two Latin letters fill one cell; it changes layout, not the unit.
Compatibility normalization folds layout variants into ordinary text, so ㏊ can become ha. Unicode’s NFKC and NFKD forms apply that mapping to the Latin letters h and a. Unicode recorded ㏊ in 1993; that dates encoding, not the boxed form’s invention.
Don't confuse it with
1Questions 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.
How to type ㏊
Windows (Word)
Alt+XType 33CA, then Alt+X to get ㏊.
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 “square ha”.
Linux
Ctrl+Shift+UType 33ca, then Enter or Space.
HTML
㏊CSS
\33CACodes and encoding1 code points
HTML decimal
㏊
HTML hex
㏊
CSS content
content: "\33CA";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E3%8F%8A
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.