How to Type the Theta Symbol θ on Keyboard

The theta symbol looks like this: θ.

Theta is a Greek letter used in mathematics, geometry, trigonometry, physics, statistics, engineering, and many other technical subjects. It is especially common when writing about angles.

You may see theta in formulas, equations, academic papers, geometry problems, science reports, and technical documents.

This guide will show you how to type the theta symbol on Windows, Mac, Microsoft Word, Excel, PowerPoint, Google Docs, Google Sheets, iPhone, Android, Chromebook, HTML, and web pages.

You can copy and paste the theta symbol from this page, or you can use the keyboard shortcuts and symbol tools explained below.

Table of Contents

Quick Answer: How to Type the Theta Symbol

The fastest way to type the theta symbol depends on your device or app.

Device or App	Shortcut or Method	Result
Windows	Hold Alt and type 952 on the numeric keypad in some apps	θ
Microsoft Word	Type 03B8, then press Alt + X	θ
Microsoft Word Equation	Type \theta, then press Space	θ
Mac	Use Character Viewer or copy and paste	θ
Google Docs	Go to Insert > Special characters and search for theta	θ
HTML	Use `θ` or `θ`	θ
Unicode	U+03B8	θ

Click to Copy the Theta Symbol

Copy the Theta Symbol

Click any theta symbol, Greek letter, or code below to copy it, then paste it into Word, Excel, Google Docs, your website, or any other app.

Theta symbols

Related Greek letters

Web codes for theta

To copy manually:

Highlight the theta symbol: θ
Press Ctrl + C on Windows or Command + C on Mac.
Click where you want to insert it.
Press Ctrl + V on Windows or Command + V on Mac.

What Is the Theta Symbol?

The theta symbol is a Greek letter.

The lowercase theta symbol is: θ

The uppercase theta symbol is: Θ

There is also a theta variant that looks like this: ϑ

Theta is the eighth letter of the Greek alphabet. In English, theta is often written as the word theta, but in mathematics and science, the Greek symbol θ is commonly used.

You may see theta in:

Geometry
Trigonometry
Mathematics
Physics
Statistics
Engineering
Academic writing
Scientific reports

For example:

θ = 45°

or:

sin θ

or:

cos θ

Theta Symbol Quick Reference

Item	Lowercase Theta	Uppercase Theta	Theta Variant
Symbol	θ	Θ	ϑ
Name	Greek small letter theta	Greek capital letter theta	Greek theta symbol
Unicode	U+03B8	U+0398	U+03D1
Word Unicode Shortcut	03B8, then Alt + X	0398, then Alt + X	03D1, then Alt + X
Windows Alt Code	Alt + 952 may work in some apps	Alt + 920 may work in some apps	Use Unicode or copy/paste
HTML Entity	`θ`	`Θ`	`&thetasym;`
HTML Decimal Code	`θ`	`Θ`	`ϑ`
HTML Hex Code	`θ`	`Θ`	`ϑ`

Important: The most common theta symbol is lowercase theta θ. The variant ϑ is used in some math contexts, but most people searching for theta want θ.

Method 1: Type the Theta Symbol on Windows Using Alt Code

On Windows, you may be able to type the lowercase theta symbol using an Alt code.

The Unicode decimal value for lowercase theta is:

952

So in some Unicode-supported Windows apps, you can try:

Alt + 952

Steps to try Alt + 952 on Windows

Click where you want to insert the theta symbol.
Turn on Num Lock.
Hold down the Alt key.
While holding Alt, type 952 using the numeric keypad.
Release the Alt key.

If your app supports this input method, you may get: θ

Important note about Alt codes

Alt codes usually require the numeric keypad on the right side of the keyboard.

The number row above the letters may not work.

Also, not every Windows app handles longer Unicode Alt codes the same way. Because of that, the most reliable Windows method for theta is usually the Microsoft Word Unicode shortcut, explained next.

What if Alt + 952 does not work?

Use one of these methods instead:

Copy and paste θ
Use Microsoft Word’s Unicode shortcut: 03B8, then Alt + X
Use Insert Symbol in Word, Excel, or PowerPoint
Use Windows Character Map
Use Google Docs Special characters

Method 2: Type the Theta Symbol in Microsoft Word

Microsoft Word gives you several reliable ways to insert the theta symbol.

The best methods are:

Use the Unicode shortcut: 03B8, then Alt + X
Use Insert > Symbol
Use the Equation tool
Copy and paste the symbol

Option A: Use the Word Unicode Shortcut

This is one of the best ways to type the theta symbol in Microsoft Word on Windows.

The Unicode for lowercase theta is:

03B8

Steps

Open Microsoft Word.
Click where you want the theta symbol.
Type 03B8.
Press Alt + X.

Word will convert 03B8 into: θ

For uppercase theta

The Unicode for uppercase theta is:

0398

To type uppercase theta in Word:

Type 0398.
Press Alt + X.

You should get: Θ

For the theta variant ϑ

The Unicode for the theta variant is:

03D1

To type it in Word:

Type 03D1.
Press Alt + X.

You should get: ϑ

Option B: Use Insert Symbol in Word

You can also insert theta from Word’s Symbol menu.

Steps

Open Microsoft Word.
Click where you want the theta symbol.
Go to the Insert tab.
Click Symbol.
Click More Symbols if needed.
In the font box, choose normal text or a common font.
In the subset box, choose Greek and Coptic.
Find and select θ.
Click Insert.
Click Close.

This method is good if you do not want to remember any code.

Tip: After you insert theta once, Word may show it under recently used symbols, making it easier to insert again later.

Option C: Use the Equation Tool in Word

If you are writing a formula, the Equation tool may be the best option.

Steps

Open Microsoft Word.
Go to the Insert tab.
Click Equation.
Type \theta inside the equation box.
Press Space.

Word should convert it into: θ

This method is especially useful when theta is part of a mathematical equation.

Example

Type this inside a Word equation:

\theta

Then press Space.

You get: θ

For uppercase theta in an equation

Inside a Word equation, type:

\Theta

Then press Space.

You should get: Θ

Method 3: Type the Theta Symbol in Excel

You can insert the theta symbol in Excel using several methods.

The easiest options are:

Copy and paste θ
Use Insert > Symbol
Use the UNICHAR function in formulas
Try Alt + 952 if supported on your Windows setup

Option A: Copy and Paste in Excel

The easiest method is to copy the symbol from this page:

Then paste it into Excel using:

Ctrl + V on Windows

or:

Command + V on Mac

Option B: Use Insert Symbol in Excel

Click the cell where you want the theta symbol.
Go to the Insert tab.
Click Symbol.
In the subset box, choose Greek and Coptic.
Select θ.
Click Insert.
Close the Symbol window.

This is a reliable method if the Alt code does not work.

Option C: Use the UNICHAR Function in Excel

In Excel, you can also use the UNICHAR function.

The Unicode decimal number for lowercase theta is:

952

So you can type this formula into a cell:

=UNICHAR(952)

This returns: θ

For uppercase theta, use:

=UNICHAR(920)

This returns: Θ

For the theta variant, use:

=UNICHAR(977)

This returns: ϑ

This method is useful if you want Excel to generate the symbol as part of a formula.

Option D: Add Theta After Text in Excel

If you want to add theta after text in a cell, you can simply type or paste it.

Example:

Angle θ = 45°

To add it to existing text:

Double-click the cell, or select the cell and press F2.
Move your cursor to where you want the symbol.
Insert theta using copy/paste, Insert Symbol, or UNICHAR.
Press Enter.

Method 4: Type the Theta Symbol in PowerPoint

PowerPoint supports the same basic methods as Word and Excel.

You can use:

Copy and paste
Insert > Symbol
Equation tool, if you are creating a formula
Try Alt + 952 on Windows if supported

Use Copy and Paste in PowerPoint

Copy this symbol:

Then paste it inside your PowerPoint text box.

Use Insert Symbol in PowerPoint

Click inside your text box.
Go to Insert.
Click Symbol.
Choose Greek and Coptic from the subset list.
Select θ.
Click Insert.

Use Equation in PowerPoint

If you are writing a formula:

Go to Insert.
Click Equation.
Type \theta.
Press Space.

PowerPoint should convert it into: θ

Method 5: Type the Theta Symbol on Mac

Mac does not have a simple universal keyboard shortcut for theta like it does for some common symbols.

The easiest methods on Mac are:

Copy and paste θ
Use Character Viewer
Use the Equation tool in Word or PowerPoint
Use a text replacement shortcut

Option A: Copy and Paste on Mac

Copy this symbol:

Then paste it where you need it using:

Command + V

Option B: Use Character Viewer on Mac

Mac has a built-in Character Viewer that lets you search for Greek letters and symbols.

Steps

Click where you want the theta symbol.
Press Control + Command + Space.
The Character Viewer will open.
Search for theta.
Double-click θ to insert it.

You can also search for Greek and browse the Greek letters.

Option C: Create a Text Replacement Shortcut on Mac

If you type theta often, you can create a shortcut.

For example:

thetax → θ

Steps

Open System Settings.
Go to Keyboard.
Find Text Replacements.
Add a new replacement.
In the shortcut field, type thetax.
In the replacement field, paste θ.
Save it.

Now, when you type thetax, your Mac can replace it with θ.

Use a shortcut that you do not normally type by accident.

Method 6: Type the Theta Symbol in Google Docs

Google Docs makes it easy to insert the theta symbol using Special characters.

Option A: Use Insert Special Characters

Open Google Docs.
Click where you want the theta symbol.
Go to Insert.
Click Special characters.
In the search box, type theta.
Click the θ symbol.

Google Docs will insert theta into your document.

Option B: Draw the Symbol in Google Docs

Google Docs also allows you to draw a symbol in the Special characters window.

Go to Insert > Special characters.
Use the drawing box on the right side.
Draw a shape similar to θ.
Choose the theta symbol from the results.

This is useful if you know what the symbol looks like but do not know its name.

Option C: Copy and Paste in Google Docs

Copy this symbol:

Then paste it into Google Docs using:

Ctrl + V on Windows

or:

Command + V on Mac

Option D: Create a Theta Shortcut in Google Docs

If you type theta often, you can create a substitution.

For example:

thetax → θ

Steps

Open Google Docs.
Go to Tools.
Click Preferences.
Go to Substitutions.
Add your shortcut in the left box, such as thetax.
Paste θ in the right box.
Click OK.

Now Google Docs can replace your shortcut with the theta symbol.

Method 7: Type the Theta Symbol in Google Sheets

Google Sheets does not have the same Special characters menu as Google Docs in the same way, so the easiest method is usually copy and paste.

Copy and paste method

Copy this symbol: θ
Open Google Sheets.
Click the cell where you want it.
Press Ctrl + V or Command + V.

Use UNICHAR in Google Sheets

Google Sheets supports the UNICHAR function.

To return lowercase theta, type:

=UNICHAR(952)

To return uppercase theta, type:

=UNICHAR(920)

To return the theta variant, type:

=UNICHAR(977)

Method 8: Use Windows Character Map

Character Map is a built-in Windows tool that lets you copy symbols and special characters.

Steps

Click the Windows search box.
Type Character Map.
Open the Character Map app.
Choose a common font, such as Arial or Times New Roman.
Look for θ.
Click the symbol.
Click Select.
Click Copy.
Paste it into your document.

This method is useful if Alt codes are not working.

Method 9: Use Windows Emoji and Symbols Panel

You can also try the Windows emoji and symbols panel.

Steps

Click where you want to insert theta.
Press Windows key + .You can also try Windows key + ;.
Go to the symbols section.
Look for Greek letters, if available.
Select θ.

If you cannot find theta there, use Character Map or copy and paste instead.

Method 10: Type the Theta Symbol on iPhone and iPad

The easiest way to type theta on iPhone or iPad is to copy and paste it.

Copy this:

Then paste it into your message, note, document, or browser.

Create a Text Replacement Shortcut on iPhone

If you use theta often, create a text replacement.

For example:

thetax → θ

Steps

Open Settings.
Tap General.
Tap Keyboard.
Tap Text Replacement.
Tap the + button.
In the Phrase box, paste θ.
In the Shortcut box, type thetax.
Tap Save.

Now, when you type thetax, your iPhone can suggest or insert θ.

Method 11: Type the Theta Symbol on Android

On Android, the exact method depends on your keyboard app.

The easiest method is copy and paste.

Copy this:

Then paste it where you need it.

Try the symbols keyboard

Some Android keyboards include Greek letters in their symbol sections.

Try this:

Open your keyboard.
Tap the ?123 or symbols key.
Look for more symbol pages.
If you see θ, tap it.

If you cannot find it, copy and paste is usually faster.

Create a personal dictionary shortcut

Some Android keyboards allow custom shortcuts.

You can create:

thetax → θ

The exact steps depend on your Android phone and keyboard app.

Method 12: Type the Theta Symbol on Chromebook

On Chromebook, the fastest method is usually copy and paste.

Copy this:

Then paste it into your document or text box.

If you are using Google Docs on Chromebook, you can use:

Insert > Special characters > search theta

Then click the theta symbol.

Method 13: Type the Theta Symbol in HTML

If you are writing HTML, you can use the theta symbol directly, or you can use an HTML entity.

Lowercase theta

Use:

θ

Example:

&theta; = 45&deg;

Result:

θ = 45°

Uppercase theta

Use:

Θ

Example:

&Theta;

Result: Θ

Theta variant

Use:

&thetasym;

Result: ϑ

Decimal HTML code

Lowercase theta:

&#952;

Uppercase theta:

&#920;

Theta variant:

&#977;

Hex HTML code

Lowercase theta:

&#x03B8;

Uppercase theta:

&#x0398;

Theta variant:

&#x03D1;

Method 14: Type the Theta Symbol in CSS

If you are adding theta with CSS, you can use the Unicode escape.

Lowercase theta:

.example::after {
  content: "\03B8";
}

Uppercase theta:

.example::after {
  content: "\0398";
}

Theta variant:

.example::after {
  content: "\03D1";
}

For normal writing, it is usually better to type or paste the symbol directly in your text or use HTML.

Method 15: Type the Theta Symbol in JavaScript

In JavaScript, you can use the symbol directly:

const theta = "θ";

Or you can use the Unicode escape:

const theta = "\u03B8";

For uppercase theta:

const uppercaseTheta = "\u0398";

For the theta variant:

const thetaVariant = "\u03D1";

Method 16: Type Theta in LaTeX

If you are writing in LaTeX, use:

\theta

This gives: θ

For uppercase theta, use:

\Theta

This gives: Θ

For the theta variant, use:

\vartheta

This gives the variant form: ϑ

Lowercase Theta θ vs Uppercase Theta Θ vs Theta Variant ϑ

There are three theta symbols that users often confuse.

Symbol	Name	Unicode	Common Use
θ	Greek small letter theta	U+03B8	Most common theta symbol
Θ	Greek capital letter theta	U+0398	Uppercase theta
ϑ	Greek theta symbol / theta variant	U+03D1	Alternative math style

The lowercase theta θ is the one most people are looking for.

The uppercase theta Θ is used when the capital Greek letter is needed.

The theta variant ϑ is an alternative form sometimes used in mathematics. If you are not sure which one to use, choose θ.

Common Uses of the Theta Symbol

The theta symbol is used in many fields.

In geometry

Theta is commonly used to represent an angle.

Example:

θ = 45°

In trigonometry

Theta often appears in trigonometric functions.

Examples:

sin θ

cos θ

tan θ

In mathematics

Theta can be used as a variable in equations and formulas.

Example:

θ = x + 10

In statistics

Theta can represent an unknown parameter.

Example:

θ̂

In physics and engineering

Theta can appear in formulas involving angles, rotation, waves, and other technical calculations.

Example:

angular position θ

Theta Symbol and Related Greek Letters

If you are typing theta, you may also need other Greek letters.

Symbol	Name	Unicode
α	Alpha	U+03B1
β	Beta	U+03B2
γ	Gamma	U+03B3
δ	Delta	U+03B4
θ	Theta	U+03B8
λ	Lambda	U+03BB
μ	Mu	U+03BC
π	Pi	U+03C0
σ	Sigma	U+03C3
Ω	Omega	U+03A9

Troubleshooting: Theta Symbol Not Working

If you cannot type the theta symbol, here are the common problems and fixes.

Problem 1: Alt + 952 is not working

This can happen because not every app supports longer Unicode Alt codes in the same way.

It can also happen if you are not using the numeric keypad.

Fix

Use one of these more reliable methods:

Copy and paste θ
Word Unicode shortcut: 03B8, then Alt + X
Insert Symbol
Character Map
Google Docs Special characters

If you are trying Alt codes, use the numeric keypad and make sure Num Lock is turned on.

Problem 2: I typed 03B8 but it did not change into θ

The 03B8 + Alt + X method works mainly in Microsoft Word on Windows.

It may not work in every app.

Fix

Use it inside Microsoft Word, or use copy and paste in other apps.

Problem 3: I see two different theta symbols

This is normal.

The common theta is:

The variant theta is:

If you are not sure which one to use, use θ. It is the standard lowercase theta symbol most people need.

Problem 4: Theta appears as a box or strange character

This usually means the font or app does not support the character properly.

Fix

Try changing the font to a common font such as:

Arial
Calibri
Times New Roman
Cambria
Helvetica
Verdana

Problem 5: I need theta in an equation, not normal text

If you are writing a formula in Word or PowerPoint, use the Equation tool.

Inside the equation box, type:

\theta

Then press Space.

This gives a better math-style theta symbol.

Frequently Asked Questions About the Theta Symbol

What is the theta symbol?

The theta symbol is a Greek letter. The lowercase theta is θ, the uppercase theta is Θ, and the variant theta is ϑ.

How do I type theta on Windows?

In Microsoft Word on Windows, type:

03B8

Then press:

Alt + X

Word will convert it into:

You can also try Alt + 952 using the numeric keypad in some Windows apps, but this does not work everywhere.

What is the Alt code for theta?

The Unicode decimal value for lowercase theta is 952, so Alt + 952 may work in some Windows apps.

However, the more reliable Word shortcut is:

03B8, then Alt + X

What is the Unicode for theta?

The Unicode for lowercase theta is:

U+03B8

The Unicode for uppercase theta is:

U+0398

The Unicode for the theta variant is:

U+03D1

How do I type theta in Microsoft Word?

In Microsoft Word on Windows, type:

03B8

Then press:

Alt + X

This gives:

You can also use Insert > Symbol or the Equation tool.

How do I type theta in Excel?

In Excel, you can use Insert > Symbol, copy and paste θ, or type this formula:

=UNICHAR(952)

This returns:

How do I type theta in Google Docs?

In Google Docs:

Go to Insert.
Click Special characters.
Search for theta.
Click θ.

How do I type theta on Mac?

On Mac, use Character Viewer:

Press Control + Command + Space.
Search for theta.
Double-click θ.

You can also copy and paste the theta symbol from this page.

How do I type theta on iPhone?

The easiest way is to copy and paste:

If you use it often, create a text replacement shortcut such as:

thetax → θ

How do I type theta on Android?

The easiest way is to copy and paste:

Some Android keyboards may also include theta under their symbols or Greek letters section.

What is the HTML code for theta?

For lowercase theta, use:

θ

You can also use:

θ

or:

θ

For uppercase theta, use:

Θ

For the theta variant, use:

&thetasym;

Is theta used for angles?

Yes. Theta θ is very commonly used to represent angles, especially in geometry and trigonometry.

Example:

θ = 45°

Which theta symbol should I use: θ or ϑ?

In most cases, use θ.

The symbol ϑ is a variant form used in some math contexts. If your teacher, textbook, or formula specifically uses ϑ, use that one. Otherwise, θ is the safest choice.

Best Method to Use

If you only need the theta symbol once, copy and paste it:

If you are using Microsoft Word, use:

03B8, then Alt + X

If you are using Google Docs, use:

Insert > Special characters > search theta

If you are using Excel, use:

Insert > Symbol

or:

=UNICHAR(952)

If you use theta often, create a text replacement shortcut such as:

thetax → θ

Conclusion

The theta symbol θ is useful in geometry, trigonometry, math, physics, statistics, engineering, and many other technical subjects.

The easiest way to type it depends on where you are working:

Microsoft Word: 03B8, then Alt + X
Word Equation: type \theta, then press Space
Excel: Insert Symbol or =UNICHAR(952)
Google Docs: Insert > Special characters > search theta
Mac: Character Viewer or copy/paste
HTML: θ
Any device: copy and paste θ

If you do not want to remember any shortcut, simply copy the theta symbol from this page and paste it where you need it.