Values in a chart                             Values of h	Units	Ref.
6.62606957(29)×10−34	J·s	[1]
4.135667516(91)×10−15	eV·s	[1]
6.62606957(29)×10−27	erg·s	[1]
2π	EP·tP
Values of ħ	Units	Ref.
1.054571726(47)×10−34	J·s	[1]
6.58211928(15)×10−16	eV·s	[1]
1.054571726(47)×10−27	erg·s	[1]
1	EP·tP	def
Values of hc	Units	Ref.
1.98644568×10−25	J·m
1.23984193	eV·μm
2π	EP·ℓP