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Greek Letters
Ω

Omega

U+03A9

The uppercase Greek letter omega, used in physics for the ohm unit of electrical resistance and in math for the last item in a sequence.

Copy & encode

Character
Ω
Unicode codepoint
U+03A9
HTML named entity
Ω
HTML decimal entity
Ω
HTML hex entity
Ω
CSS escape
\03A9
JavaScript escape
\u03A9

Meaning and usage

Electricians and engineers use it to mark resistance values in ohms, while mathematicians use it to represent a final or limiting value in certain notations.

Frequently Asked Questions

What is the HTML entity for omega?
Use Ω or Ω.
What does the omega symbol represent in electronics?
It represents ohms, the unit used to measure electrical resistance.