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Integral Symbol (∫)

The integral symbol is ∫. ∫ is U+222B INTEGRAL. It denotes integration; a complete expression normally includes an integrand, a differential, and sometimes limits.

Character
Unicode
U+222B

Integral Symbol Copy and Paste

Select Copy to place ∫ on the clipboard. Paste with Ctrl+V on Windows, Command+V on Mac, or the Paste command on mobile.

Copy the integral symbol One click copies the exact Unicode character.
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    Press the button to copy ∫.

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EquationsProofsTechnical documentsMath education

What Is the Integral Symbol?

∫ is U+222B INTEGRAL. It denotes integration; a complete expression normally includes an integrand, a differential, and sometimes limits.

Equations

Proofs

Technical documents

Math education

Integral Symbol Variants and Related Forms

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Venus Symbol (♀)

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Sharp Symbol (♯)

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Underscore Symbol (_)

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Circle Symbol (○)

The circle symbol is ○. ○ is U+25CB WHITE CIRCLE. It is…

Plus Symbol (+)

The plus symbol is +. + is U+002B PLUS SIGN. It commonly…

Flower Symbol (✿)

The flower symbol is ✿. ✿ is U+273F BLACK FLORETTE, a decorative…

Celsius Symbol (°C)

The celsius symbol is °C. The unit symbol for degree Celsius is…

How to Type the Integral Symbol

Choose your device or app to insert the integral symbol without copying it from another page.

Integral Symbol on Windows

In Microsoft Word, type 222B and press Alt+X. In other Windows apps, use Character Map or copy ∫ from this page.

Integral Symbol on Mac

Open Character Viewer with Control+Command+Space and search for “integral.”

Integral Symbol on iPhone and iPad

Use the Copy button to copy ∫, then paste it into the target app. Save a text-replacement shortcut only if the exact sequence is preserved.

Integral Symbol on Android

Use the Copy button to copy ∫, then paste it into the target app. Keyboard and emoji menus vary by device.

Integral Symbol on Chromebook

Copy ∫ from this page and press Ctrl+V. A supported character picker may also be available.

Integral Symbol on Microsoft Word

Paste ∫ into Word. For a single BMP character, Word can also convert its hexadecimal code with Alt+X.

Integral Symbol on Google Docs

Paste ∫ into Google Docs, or use Insert > Special characters and search by the Unicode name or page title.

Integral Symbol Unicode and HTML Codes

Use these values when you need the integral symbol in HTML, CSS, source code, or a character reference.

Unicode U+222B
Unicode name INTEGRAL
HTML decimal
HTML hex
CSS escape 222B

How to Use and Format the Integral Symbol

Format ∫ according to its role as integral notation. ∫ is U+222B INTEGRAL. It denotes integration; a complete expression normally includes an integrand, a differential, and sometimes limits. For the integral symbol, do not choose a character only because it looks similar to another glyph; verify U+222B and keep the complete sequence together.

This page covers the single integral sign and not double, triple, contour, or specialized integral operators. For web content containing the integral symbol, literal UTF-8 text is preferred when the font supports it; complete decimal or hexadecimal references are also valid. When the integral symbol conveys an action, category, identity, hazard, measurement, or other essential information, pair it with readable text and an accessible name rather than relying on shape alone.

  • Use structured math markup for limits.

  • Include the integration variable and differential.

  • Distinguish indefinite and definite integrals.

  • Use the exact encoded form U+222B for integral symbol content.

  • Use UTF-8 text or complete numeric character references when publishing ∫ on the web.

  • Test ∫ in the target font, application, and screen-reader workflow.

  • Keep a visible text label near ∫ when readers may not recognize the glyph.

Integral Symbol Examples

  • ∫ f(x) dx
  • ∫₀¹ x² dx
  • A = ∫ y dx
  • Antiderivative: ∫ 2x dx = x² + C
  • Definite integral: ∫ₐᵇ f(t) dt
  • Unicode sequence for Integral Symbol: U+222B
  • HTML decimal: ∫
  • HTML hexadecimal: ∫
  • CSS escapes: 222B
  • Accessible text label: Integral Symbol

Common Integral Symbol Mistakes

  • Omitting the differential such as dx.
  • Confusing ∫ with the elongated letter S in ordinary text.
  • Using a plain-text integral for complex limits that need equation layout.
  • Forgetting the constant of integration in an indefinite integral.
  • Replacing the integral symbol with a lookalike without checking the code point or sequence.
  • Assuming the integral symbol has exactly the same glyph in every font and operating system.
  • Converting the integral symbol to an image when selectable and searchable text is required.
  • Using ∫ as the only accessible name of an interactive control.

More About the Integral Symbol

The integral symbol is shown as ∫. ∫ is U+222B INTEGRAL. It denotes integration; a complete expression normally includes an integrand, a differential, and sometimes limits. The encoded form used on the integral symbol page is U+222B, with the Unicode name or sequence INTEGRAL. This page covers the single integral sign and not double, triple, contour, or specialized integral operators. For the integral symbol, this boundary prevents a shared glyph from turning into duplicated search intent.

Searches such as “integral symbol” usually lead to one of four tasks: identify the notation, copy the exact text, type it on a device, or check how it should be formatted. The integral symbol page consolidates those same-intent query variants instead of creating separate thin pages. Its examples, mistakes, and FAQs are written for integral use rather than copied from another symbol page.

Use the Copy control for integral symbol text when plain text is appropriate. In equations, measurements, drawings, safety information, finance, or interface controls, also follow the standard that governs integral usage and add semantic markup or visible labels. Font design can change the appearance of the integral symbol, but U+222B remains its reliable encoded identifier. The source list for Integral Symbol records the Unicode chart and the specialized statistical, SI, accessibility, safety, currency, or medical guidance used here.

Integral Symbol FAQ

What is the integral symbol?

∫ is U+222B INTEGRAL. It denotes integration; a complete expression normally includes an integrand, a differential, and sometimes limits.

What is the Unicode for ∫?

The encoded form is U+222B: INTEGRAL.

How do I type ∫?

Windows: In Microsoft Word, type 222B and press Alt+X. In other Windows apps, use Character Map or copy ∫ from this page. Mac: Open Character Viewer with Control+Command+Space and search for “integral.”

Why does an integral use ∫?

The sign historically derives from an elongated S for sum.

How do I add upper and lower limits?

Use an equation editor, MathML, or LaTeX to attach limits to ∫.