Celsius Symbol (°C)

The measurement form reviewed here is °C; its encoded components are U+00B0 U+0043. The unit symbol for degree Celsius is the two-character sequence °C. SI style places a space between the numerical value and the unit symbol, as in 25 °C. Measurement examples include Room temperature: 25 °C, Water temperature: 18 °C, Set point: 20 °C, and Range: 15 °C to 25 °C. They preserve unit case, spacing, prefixes, and attached marks. The scope is deliberately narrow: The unit symbol for degree Celsius is the two-character sequence °C. The Celsius Symbol page separates °C from lookalikes and from broader concepts that do not share the same encoded identity. Common corrections are needed when authors are writing 25°C without the SI space, using 300 °K instead of 300 K, and using the compatibility character ℃ when the standard expression °C is required. For Celsius Symbol, confirm that the pasted text still contains °C and has not been replaced by a visually similar form. The page’s reviewed style guidance is: place one space between the value and °C, keep the C uppercase, use K without a degree sign for kelvin, and use the exact encoded form U+00B0 U+0043 for celsius symbol content. In markup, use the literal character or the complete references ° C and ° C; the saved CSS form is B0 43. Do not omit any code point in a multi-character notation. A useful scope question is “Should there be a space before °C?” The reviewed answer is: Yes. NIST SI guidance writes 25 °C. For manual entry, the retained Windows method is: copy °C from this page or build the complete sequence in Word or an equation editor; it is not a single code point. The macOS method is: copy °C from this page or build the complete sequence in the target editor; it is not a single code point. Final QA should verify U+00B0 U+0043, the complete character sequence, and the context in which °C appears. Keep Celsius Symbol as selectable text rather than an image whenever the actual character °C is the information being published.