Theta Symbol Copy Paste

Copy θ, or take the capital Θ, the script ϑ or an angle string such as sinθ from the table.

θGreek small letter thetaU+03B8Ready to copy

60 theta characters and formulas. Tap any value to copy it.

60 theta characters and formulas. A character and its name both copy the character. A code copies the code.
Character	Name	Code point	Alt code	HTML	LaTeX
	U+03B8. The eighth letter of the Greek alphabet and the usual name for an unknown angle. It has no Alt code: Alt+233 types the capital. θ in HTML and \theta in LaTeX.
	U+0398. The capital, and the only theta with an Alt code: Alt+233 on a number pad. Θ in HTML and \Theta in LaTeX. Big theta marks a tight bound in the analysis of algorithms, and an upright sans-serif capital Θ is the dimension symbol of temperature.
	U+03D1. Script theta, the open form with a tail, which Unicode's names list calls a technical symbol. &thetasym; in HTML and \vartheta in LaTeX.
	U+1D703. The slanted theta of a printed formula. Unicode defines it as U+03B8 in an italic font. It has no HTML name of its own.
	U+1D73D. Bold and slanted: U+03B8 in a bold italic font, by Unicode's definition.
	U+03F4. A capital whose bar runs the whole way across and touches the ring on both sides. Added in Unicode 3.1 (2001). No HTML name and no standard LaTeX macro.
	U+1DBF. A raised small theta. Unicode defines it as a superscript U+03B8. Added in Unicode 4.1 (2005).
	Made of U+0073, U+0069, U+006E and U+03B8. The letters s, i and n, then theta, with no space between.
	Made of U+0063, U+006F, U+0073 and U+03B8. The letters c, o and s, then theta, with no space between.
	Made of U+2220 and U+03B8. The angle sign, U+2220, in front of theta. &ang; is the HTML name of the sign.
	U+1D6C9. Upright bold. One of five maths styles of small theta, all added in Unicode 3.1 (2001).
	U+1D777. Bold with no serifs. Unicode has sans-serif Greek in bold and bold italic only.
	U+1D7B1. Bold, slanted and without serifs.
	U+1D6AF. Upright bold capital. Unicode defines it as U+0398 in a bold font.
	U+1D6E9. Slanted capital.
	U+1D723. Bold and slanted capital.
	U+1D75D. Bold capital with no serifs.
	U+1D797. Bold, slanted capital with no serifs.
	U+1D6B9. The full-bar capital, U+03F4, in upright bold.
	U+1D6F3. The full-bar capital in italic.
	U+1D72D. The full-bar capital in bold italic.
	U+1D767. The full-bar capital in sans-serif bold.
	U+1D7A1. The full-bar capital in sans-serif bold italic.
	U+1D6DD. Script theta in upright bold. Unicode defines it as U+03D1 in a bold font.
	U+1D717. Script theta, slanted, as in the theta function ϑ(z; τ).
	U+1D751. Script theta, bold and slanted.
	U+1D78B. Script theta, bold with no serifs.
	U+1D7C5. Script theta, bold, slanted and without serifs.
	Made of U+0074, U+0061, U+006E and U+03B8. The letters t, a and n, then theta.
	Made of U+03B8 and U+00B0. Theta and the degree sign, U+00B0, which is Alt+248 on its own.
	Made of U+0394 and U+03B8. Capital delta, U+0394, then theta: a change in angle.
	Made of U+0064 and U+03B8. A plain d and theta, the end of an integral taken over an angle.
	Made of U+0073, U+003D, U+0072 and U+03B8. Arc length is the radius times the angle, with theta in radians.
	Made of U+03B8 and U+2080. Theta with a subscript zero, U+2080: a starting angle.
	Made of U+03B8 and U+2081. Theta with a subscript one, U+2081.
	Made of U+03B8 and U+2082. Theta with a subscript two, U+2082.
	Made of U+03B8 and U+0307. Theta with a combining dot above, U+0307, which is Newton's mark for a derivative: angular velocity.
	Made of U+03B8 and U+0308. Theta with a combining diaeresis, U+0308, the mark for a second derivative: angular acceleration.
	Made of U+03B8 and U+0302. Theta with a combining circumflex, U+0302. Theta is a usual name for a statistical parameter, and the hat marks an estimate of it.
	Made of U+0398, U+0028, U+006E and U+0029. Capital theta, then n in brackets: a running time that grows in step with n.
	U+0472. The early Cyrillic letter that developed from theta. Russian kept it until the spelling reform of 1918.
	U+0473. Small fita. Unicode cross-references it to U+03B8 and to the barred o, U+0275.
	U+2C90. Thethe, the Coptic counterpart of theta. Added with the Coptic block in Unicode 4.1 (2005).
	U+2C91. The small letter of the Coptic pair.
	U+2C2A. The Glagolitic letter named fita, like the Cyrillic one. Added in Unicode 4.1 (2005).
	U+2C5A. The small letter of the Glagolitic pair.
	U+10308. A letter of the Old Italic block. Archaic theta was a cross within a circle, as in Etruscan. Added in Unicode 3.1 (2001).
	U+0275. Barred o, a phonetic sign for a rounded central vowel. The th of thing is written with the Greek letter itself.
	U+019F. The capital of the barred o, used in African languages. Unicode's own note says the formal name does not describe the glyph.
	U+1DB1. A raised barred o, the look-alike of the raised theta U+1DBF. Added in Unicode 4.1 (2005).
	U+04E8. The Cyrillic letter oe. It is a different letter from fita and from theta, and is often taken for one.
	U+04E9. Small Cyrillic barred o. Unicode cross-references it to the Latin barred o, U+0275.
	U+A74A. A Latin O with a long bar through it. Added in Unicode 5.1 (2008).
	U+A74B. The small letter of the same pair.
	U+2296. A maths operator, also called symmetric difference. &ominus; in HTML and \ominus in LaTeX.
	U+229D. A short dash in a ring. \circleddash in LaTeX needs the amssymb package.
	U+29B5. A maths sign that Unicode cross-references to the circled minus. &ohbar; in HTML. Added in Unicode 3.2 (2002).
	U+236C. Zilde, one of the signs of the APL programming language. Its Compose sequence is 0 then ~, which also describes the drawing.
	U+1DF24. A t joined to a theta, filed with the affricate ligatures of Latin Extended-G. New in Unicode 18.0 (2026).
	U+1DF3C. A theta with a palatal hook, a phonetic letter of Latin Extended-G. New in Unicode 18.0 (2026).

Next step Θ is Alt+233: see every Alt code Your own words in serif bold and italic

How it works

θ is the theta symbol: Greek small letter theta, U+03B8. The 60 rows add the capital Θ, the script form ϑ, the full-bar ϴ, maths styles such as 𝜃, and angle strings such as cosθ, Δθ and s=rθ, which paste in one piece.

Read the full guide

θ, ϑ and ϴ are three code points

Unicode keeps the shapes apart. θ, U+03B8, is the closed letter. ϑ, U+03D1, is script theta, drawn with an open loop, and it is what \vartheta and &thetasym; give. ϴ, U+03F4, is a capital whose bar touches the ring on both sides, added in 2001. Greek words take θ and Θ only.

Tips

Alt+233 types the capital Θ. The small θ has no Alt code and no Option key, so copying it is the short way.
ɵ, Ө and ⊖ are not theta: a phonetic vowel, a Cyrillic letter and a maths operator. Eleven look-alikes are listed, each under its name.
Θ(n), big theta, marks a tight bound on a running time. A capital Θ is also the dimension symbol of temperature.

Questions and answers

How do I type the theta symbol on a keyboard?

The small θ has no Alt code. On Windows, Alt with 233 on the number pad gives the capital Θ. In Word, type 03B8, then Alt and X. On a Mac, press Fn or Globe with E and search theta. On a phone, copy it.

What is the HTML code for theta?

θ is the small letter and Θ the capital. As numbers, θ is θ or θ. Script ϑ has three names: &thetasym;, ϑ and ϑ. The full-bar ϴ has no named entity, so write ϴ.

How do I write theta in LaTeX?

\theta prints θ and \Theta the capital, in maths mode with no package. \vartheta prints the script form. For angular velocity write \dot{\theta}, which sets one dot above. \ddot{\theta} sets two, and \hat{\theta} sets the hat of a statistical estimate.

What does theta mean in maths?

Lowercase θ usually names an unknown angle, and in statistics a parameter. Capital Θ marks a tight bound on an algorithm's running time, and in finance theta is an option's time decay. It is the eighth letter of the Greek alphabet.

All 60 theta characters and formulas

Start here 10

Angle theta Made of U+2220 and U+03B8. The angle sign, U+2220, in front of theta. &ang; is the HTML name of the sign.
Cosine of theta Made of U+0063, U+006F, U+0073 and U+03B8. The letters c, o and s, then theta, with no space between.
Greek capital letter theta U+0398. The capital, and the only theta with an Alt code: Alt+233 on a number pad. Θ in HTML and \Theta in LaTeX. Big theta marks a tight bound in the analysis of algorithms, and an upright sans-serif capital Θ is the dimension symbol of temperature.
Greek capital theta symbol U+03F4. A capital whose bar runs the whole way across and touches the ring on both sides. Added in Unicode 3.1 (2001). No HTML name and no standard LaTeX macro.
Greek small letter theta U+03B8. The eighth letter of the Greek alphabet and the usual name for an unknown angle. It has no Alt code: Alt+233 types the capital. θ in HTML and \theta in LaTeX.
Greek theta symbol U+03D1. Script theta, the open form with a tail, which Unicode's names list calls a technical symbol. &thetasym; in HTML and \vartheta in LaTeX.

Show all 60 theta characters and formulas (54 more)

Start here, continued

Mathematical bold italic small theta U+1D73D. Bold and slanted: U+03B8 in a bold italic font, by Unicode's definition.
Mathematical italic small theta U+1D703. The slanted theta of a printed formula. Unicode defines it as U+03B8 in an italic font. It has no HTML name of its own.
Modifier letter small theta U+1DBF. A raised small theta. Unicode defines it as a superscript U+03B8. Added in Unicode 4.1 (2005).
Sine of theta Made of U+0073, U+0069, U+006E and U+03B8. The letters s, i and n, then theta, with no space between.

Small theta 3

Mathematical bold small theta U+1D6C9. Upright bold. One of five maths styles of small theta, all added in Unicode 3.1 (2001).
Mathematical sans-serif bold italic small theta U+1D7B1. Bold, slanted and without serifs.
Mathematical sans-serif bold small theta U+1D777. Bold with no serifs. Unicode has sans-serif Greek in bold and bold italic only.

Capital theta 10

Mathematical bold capital theta U+1D6AF. Upright bold capital. Unicode defines it as U+0398 in a bold font.
Mathematical bold capital theta symbol U+1D6B9. The full-bar capital, U+03F4, in upright bold.
Mathematical bold italic capital theta U+1D723. Bold and slanted capital.
Mathematical bold italic capital theta symbol U+1D72D. The full-bar capital in bold italic.
Mathematical italic capital theta U+1D6E9. Slanted capital.
Mathematical italic capital theta symbol U+1D6F3. The full-bar capital in italic.
Mathematical sans-serif bold capital theta U+1D75D. Bold capital with no serifs.
Mathematical sans-serif bold capital theta symbol U+1D767. The full-bar capital in sans-serif bold.
Mathematical sans-serif bold italic capital theta U+1D797. Bold, slanted capital with no serifs.
Mathematical sans-serif bold italic capital theta symbol U+1D7A1. The full-bar capital in sans-serif bold italic.

Script theta ϑ 5

Mathematical bold italic theta symbol U+1D751. Script theta, bold and slanted.
Mathematical bold theta symbol U+1D6DD. Script theta in upright bold. Unicode defines it as U+03D1 in a bold font.
Mathematical italic theta symbol U+1D717. Script theta, slanted, as in the theta function ϑ(z; τ).
Mathematical sans-serif bold italic theta symbol U+1D7C5. Script theta, bold, slanted and without serifs.
Mathematical sans-serif bold theta symbol U+1D78B. Script theta, bold with no serifs.

Angles and formulas 12

Arc length formula Made of U+0073, U+003D, U+0072 and U+03B8. Arc length is the radius times the angle, with theta in radians.
Big theta of n Made of U+0398, U+0028, U+006E and U+0029. Capital theta, then n in brackets: a running time that grows in step with n.
Change in theta Made of U+0394 and U+03B8. Capital delta, U+0394, then theta: a change in angle.
Differential of theta Made of U+0064 and U+03B8. A plain d and theta, the end of an integral taken over an angle.
Tangent of theta Made of U+0074, U+0061, U+006E and U+03B8. The letters t, a and n, then theta.
Theta dot Made of U+03B8 and U+0307. Theta with a combining dot above, U+0307, which is Newton's mark for a derivative: angular velocity.
Theta double dot Made of U+03B8 and U+0308. Theta with a combining diaeresis, U+0308, the mark for a second derivative: angular acceleration.
Theta hat Made of U+03B8 and U+0302. Theta with a combining circumflex, U+0302. Theta is a usual name for a statistical parameter, and the hat marks an estimate of it.
Theta in degrees Made of U+03B8 and U+00B0. Theta and the degree sign, U+00B0, which is Alt+248 on its own.
Theta nought Made of U+03B8 and U+2080. Theta with a subscript zero, U+2080: a starting angle.
Theta one Made of U+03B8 and U+2081. Theta with a subscript one, U+2081.
Theta two Made of U+03B8 and U+2082. Theta with a subscript two, U+2082.

Other alphabets 7

Coptic capital letter thethe U+2C90. Thethe, the Coptic counterpart of theta. Added with the Coptic block in Unicode 4.1 (2005).
Coptic small letter thethe U+2C91. The small letter of the Coptic pair.
Cyrillic capital letter fita U+0472. The early Cyrillic letter that developed from theta. Russian kept it until the spelling reform of 1918.
Cyrillic small letter fita U+0473. Small fita. Unicode cross-references it to U+03B8 and to the barred o, U+0275.
Glagolitic capital letter fita U+2C2A. The Glagolitic letter named fita, like the Cyrillic one. Added in Unicode 4.1 (2005).
Glagolitic small letter fita U+2C5A. The small letter of the Glagolitic pair.
Old italic letter the U+10308. A letter of the Old Italic block. Archaic theta was a cross within a circle, as in Etruscan. Added in Unicode 3.1 (2001).

Look-alikes that are not theta 11

APL functional symbol zilde U+236C. Zilde, one of the signs of the APL programming language. Its Compose sequence is 0 then ~, which also describes the drawing.
Circle with horizontal bar U+29B5. A maths sign that Unicode cross-references to the circled minus. &ohbar; in HTML. Added in Unicode 3.2 (2002).
Circled dash U+229D. A short dash in a ring. \circleddash in LaTeX needs the amssymb package.
Circled minus U+2296. A maths operator, also called symmetric difference. &ominus; in HTML and \ominus in LaTeX.
Cyrillic capital letter barred O U+04E8. The Cyrillic letter oe. It is a different letter from fita and from theta, and is often taken for one.
Cyrillic small letter barred o U+04E9. Small Cyrillic barred o. Unicode cross-references it to the Latin barred o, U+0275.
Latin capital letter O with long stroke overlay U+A74A. A Latin O with a long bar through it. Added in Unicode 5.1 (2008).
Latin capital letter O with middle tilde U+019F. The capital of the barred o, used in African languages. Unicode's own note says the formal name does not describe the glyph.
Latin small letter barred o U+0275. Barred o, a phonetic sign for a rounded central vowel. The th of thing is written with the Greek letter itself.
Latin small letter o with long stroke overlay U+A74B. The small letter of the same pair.
Modifier letter small barred o U+1DB1. A raised barred o, the look-alike of the raised theta U+1DBF. Added in Unicode 4.1 (2005).

May be an empty box 2

Latin small letter t-theta digraph U+1DF24. A t joined to a theta, filed with the affricate ligatures of Latin Extended-G. New in Unicode 18.0 (2026).
Latin small letter theta with palatal hook U+1DF3C. A theta with a palatal hook, a phonetic letter of Latin Extended-G. New in Unicode 18.0 (2026).

How this list was compiled: Names, and the code points they belong to, are checked against UnicodeData.txt, version 18.0.0 (https://www.unicode.org/Public/18.0.0/ucd/UnicodeData.txt), and printed in sentence case; its decomposition field is what says a maths alphabet character is U+03B8, U+0398, U+03D1 or U+03F4 in a font, and that U+1DBF is a superscript U+03B8. Other names, cross-references and notes (script theta, symmetric difference, the formal name does not describe the glyph, the dot above as Newton's derivative mark, the headings of Latin Extended-G) are from NamesList.txt of the same version (https://www.unicode.org/Public/18.0.0/ucd/NamesList.txt); the version a character was added in is from DerivedAge.txt (https://www.unicode.org/Public/18.0.0/ucd/DerivedAge.txt), block names are from Blocks.txt, and the years are from https://www.unicode.org/history/publicationdates.html. Alt codes are from the code page 437 table (https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/PC/CP437.TXT), where 233 is the capital theta and the small letter is absent, and from the code page 1252 table (https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP1252.TXT), which has neither. A U.S. keyboard layout has no Option key for any theta. HTML entity names are from https://html.spec.whatwg.org/entities.json, the HTML 4 name first where there is one, else the shortest. LaTeX macros are listed only when LaTeX's own fontdef.dtx (https://raw.githubusercontent.com/latex3/latex2e/develop/base/fontdef.dtx) or the amssymb and amsfonts sources (https://mirrors.ctan.org/fonts/amsfonts/source/) define them, matched to a code point through unicode-math-table.tex (https://github.com/latex3/unicode-math). The Compose sequence of the zilde is from https://gitlab.freedesktop.org/xorg/lib/libx11/-/raw/master/nls/en_US.UTF-8/Compose.pre. What the letter is for, as https://en.wikipedia.org/wiki/Theta records it: the eighth letter, the unknown angle, the statistical parameter, the theta functions, the italic capital as the dimension of temperature, big theta as a tight bound, the open form of U+03D1 and the full bar of U+03F4, fita and the reform of 1918, the barred o as a vowel sign, and the archaic cross within a circle. The dimension symbol of temperature: https://en.wikipedia.org/wiki/International_System_of_Quantities, checked 2026-09-20. The last group holds characters that one ordinary computer had no font for on the day this list was checked; your device may differ. What is listed: every character Unicode names theta, the letters of other alphabets that the article or Unicode ties to it, characters often mistaken for it, and this site's own angle and formula strings, which are two to four characters in a row with nothing between them. Left out: the other Greek letters (each has its own page), the empty set and the diameter sign, which have a slanted stroke and pages of their own. The Start here group, the made rows and the order are this site's own choice. All sources were checked on 2026-09-19. Licence: own work (facts from the Unicode Character Database, Unicode License v3, and from Wikipedia, CC BY-SA 4.0, restated in our own words; aliases and notes marked as Unicode's are quoted from NamesList.txt, Copyright © 1991-2026 Unicode, Inc., https://www.unicode.org/license.txt)