Degree (symbol)
In Unicode, the "degree sign" is U+00B0 (°). The HTML named entity for it is °.
Due to a similar appearance in some fonts in print and on computer screens, some other characters may be mistakenly substituted for it: the "masculine ordinal indicator" (U+00BA, º), the "ring above" (U+02DA, ˚), "superscript zero" (U+2070, ⁰), superscript zero proper (0) or superscript letter "o" (o), and the "ring operator" (U+2218, ∘).
On Macintosh computers, the degree sign can be typed by option-shift-8 on most keyboard layouts, including Australian, British, Canadian, US and US Extended layouts.