Surface Integral
Part of Math Symbols
Surface Integral has no standard Windows Alt code. Copy the character directly, or use its HTML entity or Unicode value instead.
- Alt code
- None
- HTML entity
- ∯
- Unicode
- U+222F
About this symbol
∯ is the surface integral over a closed surface, such as the skin of a sphere. In Gauss’s law of electricity it adds up the electric field passing out through a closed surface, which equals the charge inside.
Unicode facts
- Official name
- SURFACE INTEGRAL
- Type
- Maths symbol
- Unicode block
- Mathematical Operators
- Unicode group
- Integrals
- Added in
- Unicode 1.1 (1993)
Click the symbol or any value at the top of the page to copy it. See the full Math Symbols chart for related characters.