Copy & encode
Character
ΣUnicode codepoint
U+03A3HTML named entity
ΣHTML decimal entity
ΣHTML hex entity
ΣCSS escape
\03A3JavaScript escape
\u03A3Meaning and usage
It is the standard summation symbol in math and statistics, written above and below with the range of values being added together.
Frequently Asked Questions
What is the HTML entity for sigma?
Use Σ or Σ.
What does the sigma symbol Σ mean in a formula?
It means 'sum of', instructing you to add up all the values described in the expression that follows it.