Kelvin Sign K

U+212A
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Symbol Meaning

The Latin letter K is used to indicate heating or cooling on the Kelvin scale. Note that the degree symbol ° is not used before this letter. Such a notation was established at the General Conference on Weights and Measures in 1967.

Kelvin is one of the main units of temperature measurement. The scale is based on Boltzmann's constant, and its zero coincides with absolute zero – the minimum temperature limit in the universe.

The symbol “Kelvin degree sign” may be used in any texts about climate and weather, on websites with hydrometeorological forecasts, and in scientific works on chemistry and physics.

The symbol “Kelvin Sign” is included in the “Letterlike symbols” subblock of the “Letterlike Symbols” block and was approved as part of Unicode version 1.1 in 1993.

Text is also available in the following languages: Español; Русский;

Unicode Name Kelvin Sign
Unicode Number
HTML Code
CSS Code
Plane 0: Basic Multilingual Plane
Unicode Block Letterlike Symbols
Unicode Subblock Letterlike symbols
Lowercase k
Unicode Version 1.1 (1993)
Type of paired mirror bracket (bidi) None
Composition Exclusion No
Case change 006B
Simple case change 006B
Alphabetic +
Uppercase +
Cased +
Changes_When_Lowercased +
Changes_When_Casefolded +
Changes_When_Casemapped +
ID_Start +
ID_Continue +
XID_Start +
XID_Continue +
Grapheme_Base +
scripts Latin
Encoding hex dec (bytes) dec binary
UTF-8 E2 84 AA 226 132 170 14845098 11100010 10000100 10101010
UTF-16BE 21 2A 33 42 8490 00100001 00101010
UTF-16LE 2A 21 42 33 10785 00101010 00100001
UTF-32BE 00 00 21 2A 0 0 33 42 8490 00000000 00000000 00100001 00101010
UTF-32LE 2A 21 00 00 42 33 0 0 706805760 00101010 00100001 00000000 00000000

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