HTML Entity Detail

HTML Entity - Sigma

Sigma is a uppercase Greek alphabet letters used in mathematics, science, and engineering. This HTML entity enables web developers to display this character reliably across all browsers without encoding issues.

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Symbol preview

Unicode

U+03A3;

HTML entity

CSS code

\03A3

Usage Examples

Use this HTML entity in mathematical and scientific notation. For example, Σ for summation, Π for product, Δ for difference.

Related Entities

Π Capital Letter Pi Τ Tau σ / ς Sigma

Common Mistakes

⚠️

Mistake: Confusing Σ (capital sigma / summation) with ∑ (summation symbol)

Fix: Both Σ and ∑ are used for summation. In modern notation, ∑ is more common for the summation operator. Σ is the capital Greek letter.

⚠️

Mistake: Using S instead of Σ for summation notation

Fix: Use Σ or ∑ (not S) for summation in mathematical notation. The Latin letter S is not a valid substitute for the Greek sigma.

Sigma

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Category: Greek Alphabet - Capital Letters

Unicode	`U+03A3;`
Hex Code	`Σ`
HTML Code	`Σ`
HTML Entity	`Σ`
CSS Code	`\03A3`
Windows Shortcut
Mac Shortcut

HTML code example

<span>&#931;</span>

CSS code example

span {
    content : "\03A3";
}

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