How to Type the Lambda Symbol ( λ ) on a Mac

Struggling to type the lambda symbol on your Mac without swapping keyboards — for a math formula or to write code with flair perhaps? Find out here how to insert the lambda symbol (Λ, λ and more) on a Mac ⤓ using keyboard text replacement and the emoji panel.

How to Type the Lambda Symbol ( λ ) on a Mac Keyboard

Fastest: Using Character Viewer or the Emoji Panel

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For Frequent Use: Using Text Replacement

To input lambda characters using the keyboard alone using text replacement on a Mac:

1. Set up a key combination to expand to the desired lambda character; see below.
2. Type the designated char combination where you want to input lambda.
3. Follow up with a whitespace character or punctuation mark to complete inserting the letter lambda.

To set up a key combination for inserting lambda on a Mac:

1. Open System Settings.
2. Go to the Keyboard category.
3. Select Text Replacement… under Text Input.
4. Click +.
5. Type the character sequence you want to use for entering the lambda character under Replace.
   Example: Use llbd for minuscule lambda, for instance.
6. Enter the desired letter lambda under With using the emoji panel (see above) or copying and pasting (see below).
   
7. Click Add.
8. Now click Done.

Another Greek letter: How to Type the Symbol for Pi ( π ) on a Mac
Speaking of averages: How to Type ‘x bar’ on a Mac

How to Type the Lambda Symbol ( λ ) on a Mac Keyboard: FAQ

Can I type the lambda symbol with the keyboard alone?

Yes, using the Greek keyboard layout.

To type the Greek letters directly using the keyboard on a Mac:

1. Add the Greek keyboard layout as an input source to macOS.
2. Switch to the Greek keyboard, if but temporarily.
3. Press Λ (L on a US-English keyboard) for λ (lowercase lambda) and Shift Λ for Λ (uppercase lambda).

Other keyboards layouts (notably the US-English one) do not include combinations for entering the letters lambda directly.

It’s also a number:
Greek Numerals ⇔ Decimal Numbers Converter

Can I use Unicode to insert the lambda symbol?

Yes.

To insert a lambda symbol using Unicode Hex input:

1. Enable and switch to Unicode Hex Input on the Mac keyboard.
2. Press and hold Option.
3. Type 0 3 B B for lowercase lambda λ;
   type 0 3 9 B for uppercase lambda Λ.
4. Release the Option key.

Why does Unicode spell lambda “lamda” without the ‘b’?

The lambda characters is spelled “lamda”, in broad strokes, to be in sync with the existing ISO 8859-7 encoding of modern Greek characters (which pronounces the character “lamda”). For ISO 8859-7, “lambda” had accordingly been transcribed to English as “lamda”.

Can I also copy and paste the lambda character?

Yes.

Use the tables below to copy either the standard lambda characters or those designed for use in mathematical equations:

(Tested with macOS Tahoe 26 and Sequoia 15; first published September 2024, last updated June 2026)