To type ∑: HTML ∑ · CSS \2211 · or copy it from the key above.
01 Every way to type it
Every input method verified against an authoritative source — no invented Alt codes.
| Platform | Input | |
|---|---|---|
| HTML entity | ∑ | |
| CSS content | \2211 | |
| Linux (IBus) | Ctrl+Shift+U then 2211 |
02 Type it yourself
Paste or type here to check it renders in your own font before you use it.
03 Technical details
Encoding and reference data for N-ary Summation, derived straight from the Unicode standard.
| Code point | U+2211 |
| Decimal | 8,721 |
| Category | Symbol, math |
| Unicode version | 1.1 |
| UTF-8 | E2 88 91 |
| UTF-16 | 2211 |
| HTML entity | ∑ ∑ |
| CSS | \2211 |
| URL-encoded | %E2%88%91 |
04 FAQ
What is ∑?
∑ is “N-ary Summation”, Unicode character U+2211. Tap the key near the top of this page to copy it, then paste it anywhere that accepts Unicode text.
How do I type ∑?
Every method — Windows, Mac, HTML and CSS — is listed in the table above. The quickest option is to tap the key above to copy ∑ straight to your clipboard.
What is the HTML or CSS code for ∑?
In HTML use ∑ (decimal) or ∑ (hexadecimal). In a CSS content property use \2211.
05 Related & confusable characters
Programmatically linked from the Unicode data.
06 People also type
Guides that cover this character alongside others like it.