Squared plus (⊞) is the Unicode character at U+229E in Mathematical Operators. Official name: SQUARED PLUS. It is a boxed (square) plus operator used in specialized math notation.
Remember
Character ⊞
Unicode U+229E
Named entity ⊞
Hex entity ⊞
Decimal ⊞
CSS escape \229E
Not the same + · ⊟ · ⊠
Prefer ⊞ in HTML markup (&BoxPlus; is an alias). You can also type ⊞ in UTF-8, or use numeric forms when needed. For an ordinary plus, type + (or use an entity form of U+002B) instead.
Using Named Entity: ⊞
Using Hex Code: ⊞
Using HTML Code: ⊞
Using CSS Entity: ⊞
Typed directly: ⊞
Notation: A ⊞ B
How It Works
1. Named:⊞ is the HTML5 name for U+229E → ⊞. Best default in markup.
2. Hex:U+229E → ⊞ in HTML. Same glyph as the named form.
3. Decimal: same code point as 8862 → ⊞. Same result as hex and named.
4. CSS: use \229E in content (not an HTML entity). #point::after appends that ⊞ after the paragraph text.
5. Typed / notation: paste ⊞ in UTF-8, or write A ⊞ B for a short expression.
Pitfalls & Tips
Common mistakes when working with ⊞.
vs +
Not an ordinary plus
U+002B (+) is the common ASCII plus. U+229E is the squared (boxed) form.
vs ⊟
Not squared minus
⊟ (U+229F, ⊟) is the minus counterpart. Do not swap them.
Name
Remember ⊞
The named entity is ⊞ — not + (that name is not defined for U+002B in HTML5).
CSS vs HTML
Do not mix escapes
\229E belongs in CSS strings. ⊞ / ⊞ / ⊞ belong in HTML.
Semicolon
End named entities
Always finish with ; — write ⊞, not &plusb.
A11y
Name the operator in context
Screen readers may announce this symbol unevenly. Prefer nearby words like “squared plus” when the glyph carries meaning alone.
Compatibility
Browser Support
Squared plus (U+229E) and its entity forms (⊞, ⊞, ⊞, CSS \\229E) are supported in all mainstream browsers. Visible glyphs depend on Mathematical Operators font coverage.
✓ Universal support
Squared Plus (⊞)
Encode with named, hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+229E / entitiesFull support
Bottom line: Prefer ⊞ in HTML. Use ⊞ / ⊞ when numeric form is required, and \\229E only inside CSS content.
Remember
Key Takeaways
Unicode: squared plus is U+229E (decimal 8862) — glyph ⊞.
HTML: prefer ⊞ — also ⊞ / ⊞ / type ⊞.
CSS: use \229E inside content for generated text.
Meaning:⊞ is boxed plus — not +, not ⊟ (⊟).
Use ⊞ (named), ⊞ (hex), ⊞ (decimal), type ⊞ directly in UTF-8, or the CSS escape \229E in content. Prefer ⊞ in normal HTML.
U+229E (SQUARED PLUS). Hex 229E, decimal 8862. It belongs to Mathematical Operators (U+2200–U+22FF).
Yes. Use ⊞ (or the alias &BoxPlus;). Numeric forms ⊞ and ⊞ also work.
No. ⊞ is U+229E (⊞). + is U+002B (ASCII plus). ⊟ is U+229F (⊟, squared minus).
Use it for boxed-plus / squared-plus math notation in technical and academic pages — not as a substitute for an ordinary plus +.
HTML entities (⊞, ⊞, or ⊞) go in markup. The CSS escape \229E goes in stylesheet strings (usually content on ::before/::after).
🤔
Did you know?
Squared plus is Unicode U+229E (decimal 8862) — glyph ⊞ in Mathematical Operators (U+2200–U+22FF). HTML5 names it ⊞ (also &BoxPlus;). Official name: SQUARED PLUS. Do not confuse with plus sign U+002B (+) or squared minus U+229F (⊟, ⊟).
