∑
Summation
Summation • U+2211
Click to Copy Symbol
Symbol Description
The summation symbol indicates the sum of a sequence of terms.
Primary Uses:
- •Mathematical series
- •Statistical calculations
- •Algebraic expressions
- •Discrete mathematics
Technical Information
Unicode
U+2211
HTML Code
∑
CSS Code
\2211
Hex Code
∑
Usage Examples
∑(i=1 to n) i
∑x = x₁ + x₂ + ... + xₙ
Total = ∑ values
Input Method Guide
Windows Input Methods
1Alt Code
- 1
Make sure Num Lock is enabled
- 2
Hold down the left Alt key
- 3
Type 8721 on the numeric keypad
💡 Use Alt+8721. If Alt code fails, type 2211 then press Alt+X in Word, or use Copy & Paste.
- 4
Release Alt key, summation (∑) will appear
2Unicode (Alt+X)
- 1
Type 2211 in the document
- 2
Press Alt + X to convert to the symbol
💡 Alt+X works in Microsoft Word and many Office apps. It is not supported in Notepad and some third-party editors.
3Word Method
- 1
Type 2211 then press Alt+X in Microsoft Word
- 2
Alternatively, use Insert > Symbol if Alt+X is unavailable