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Greek Letters
θ

Greek Small Letter Theta

U+03B8

This is the lowercase eighth letter of the Greek alphabet, written as a circle with a horizontal line through the middle. It is a widely recognized mathematical and scientific symbol.

Copy & encode

Character
θ
Unicode codepoint
U+03B8
HTML named entity
θ
HTML decimal entity
θ
HTML hex entity
θ
CSS escape
\03B8
JavaScript escape
\u03B8

Meaning and usage

In mathematics, it is universally used to represent an unknown angle in geometry and trigonometry. It also serves as a variable in physics and computer science.

Frequently Asked Questions

What does theta represent in trigonometry?
In trigonometry, theta is the standard variable used to represent the measure of an angle in equations and geometric diagrams.
How can I type the theta symbol on Windows?
You can type theta on Windows by enabling the Greek keyboard layout, or by using the Alt code Alt + 952 on the numeric pad.