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Description & Usage
The Sigma Symbol is σ. Its Unicode code point is U+03C3, HTML entity is σ, CSS escape is \\3C3, and JavaScript escape is \u03C3.
Sigma (σ) is a statistics notation character for labels, formulas, data summaries, and explanatory notes within statistics symbols in the statistics group.
Practical use
Use Sigma in labels or explanations for statistical notation, and define whether it refers to a sample, population, estimate, or comparison.
Compatibility
Sigma is a Unicode character, but exact shape, weight, spacing, and fallback behavior depend on the font and platform.
Use the primary copy button for the actual character. Use the implementation codes when you need to place the same symbol in HTML, CSS, JavaScript, or technical documentation.
Related Symbols
View categoryWhere this category helps
Data summaries
Statistics Symbols help label means, variance, standard deviation, and sample notation in compact reports.
Spreadsheets and dashboards
Use symbols in labels and explanations, while keeping formulas and calculations in the spreadsheet or analytics tool. For statistics symbols, keep the surrounding label and detail notes aligned with the intended use.
Method notes
Pair statistical symbols with short definitions so readers know whether a value is a sample estimate, population parameter, or comparison. For statistics symbols, keep the surrounding label and detail notes aligned with the intended use.
Related categories
Move from statistics symbols into nearby categories when you need related Unicode signs, alternate notation, or a clearer symbol family.
Related categories in this set
Core categories
FAQ
How do I copy the Sigma?
Use the copy button on SymbolCopy to copy Sigma to your clipboard, then paste it into your document, app, website, or social post.
What is the Unicode for Sigma?
The Unicode value for Sigma is U+03C3.