U+210F "ℏ" Planck Constant over Two Pi Unicode Character

U+210F "ℏ" Planck Constant over Two Pi is a typographic symbol representing the reduced Planck constant, a fundamental physical constant that equals the Planck constant divided by two times pi. This symbol, commonly referred to as "h-bar" in scientific contexts, is used extensively in quantum mechanics to express quantities like angular momentum and the reduced form of energy quanta. Its inclusion in Unicode ensures consistent representation across digital platforms, allowing physicists, mathematicians, and engineers to accurately display this notation in documents, web pages, and technical writing without relying on custom font substitutions or mathematical markup.

General Properties

Code Point	U+210F
Version Added	1.1
Name	Planck Constant over Two Pi
Unicode 1.0 Name	Planck Constant over 2 Pi
Block	Letterlike Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"ħ" U+0127 Latin Small Letter H with Stroke

Encodings

HTML Decimal Encoding	ℏ
HTML Hex Encoding	ℏ
UTF-8 Encoding	0xE2 0x84 0x8F
UTF-16 Encoding	0x210F
UTF-32 Encoding	0x0000210F
C/C++/Java Escape	\u210f

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Lowercase	Yes
Cased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"ħ" U+0127 Latin Small Letter H with Stroke
NFKC Simple Casefold	"ħ" U+0127 Latin Small Letter H with Stroke
Script	Common
Script Extensions	Common
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Alphabetic	Yes
Math	Yes
Other Math	Yes
Vertical Orientation	Upright
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	Lower