Fillable Printable Magnetic Units Conversion Table
Fillable Printable Magnetic Units Conversion Table
Magnetic Units Conversion Table
UNITS
FOR
MAGNETIC
PROPERTIES
Quantity
Magnetic flux density,
magnetic induction
Magnetic flux
Magnetic potential difference,
ma~netomotive
force
Magnetic field strength,
,magnetizing force
(Volume) magnetization
g
(Volume) magnetization
Magnetic polarization,
intensity
of
magnetization
(Mass) magnetization
Magnetic moment
Magnetic dipole moment
(V
01
ume) susceptibility
Symbol
B
U,F
H
M
477M
1,1
(F,
M
m
j
Gaussian
& cgs emua
gauss
(0)
d
maxwell (Mx), G·cm
2
gilbert (Gb)
oersted
(Oe),e
Gb/cm
emu/cm
3
h
G
emu/cm
3
emu/g
emu,
erg/G
emu,
erg/G
dimensionless,
emu/cm
3
Conversion
factor, C
b
10-
4
10/477
477
X
10-
4
1
477
X
10-
7
10-
3
477
X
10-
10
SI & rationalized mks C
tesla (T),
Wb/m
2
weber (Wb), volt second (V·s)
ampere
(A)
A/m!
A/m
A/m
T,
Wb/m
2i
A.m
2
/kg
Wb·m/kg
A.m
2
,
joule per tesla
(l/T)
Wb·m'
dimensionless
henry per meter
(H/m),
Wb/(A.m)
(Mass) susceptibility
(Molar) susceptibility
Permeability
Relati ve permeability
j
(Volume) energy density,
energy product k
Demagnetization factor
cm
3
/g,
emu/g
477
X
10-
3
m
3
/kg
Xp, K
p
(477)2
X
10-
10
H.m
2
/kg
cm
3
/mol, emu/mol
477
X
10-
6
m
3
/mol
Xmo},
K
mo
]
(477)2
X
10-
l3
H·m
2
/mol
1J-
dimensionless
477
X
10-
7
H/m,
Wb/(A·m)
1J-r
not defined dimensionless
W
erg/cm
3
10-
l
J/m
3
D,N
dimensionless
1/477
dimensionless
a.
Gaussian units and cgs emu are the same for magnetic properties.
The
defining relation
is
B
=H
+
477M.
b.
Multiply a number in Gaussian units by C to convert it to SI (e.g., 1 G X
10-
4
T
/G
=
10-
4
T).
c.
SI (Systeme International d'Unites) has been adopted by the National Bureau
of
Standards. Where
two
conversion factors are
given, the upper one
is
recognized under,
or
consistent with, SI and
is
based on the definition B =
1J-o(H
+M), where
1J-o
=
477
X
10-
7
H/m.
The
lower one
is
not recognized under SI and
is
based on the definition B
=1J-oll
+J, where the symbol
I
is
often used
in
place
of
J.
d.
1gauss=
10
5
gamma(1').
e.
Both oersted and gauss are expressed
as
em
-1I2.
g
1l2.
S
-1
in terms
of
base units.
/.
A/m
was often expressed
as
"ampere-turn per meter" when used for magnetic field strength.
g.
Magnetic moment per unit volume.
h.
The
designation "emu"
is
not a unit.
i.
Recognized under SI, even though based on the definition B =
1J-oll
+J. See footnote c.
j.
1J-r
=
1J-/1J-o
= 1+
X,
all in SI.
1J-r
is
equal to Gaussian
1J-.
k.
B·H
and
1J-oM·H
have SI units
J/m
3
;
M·H
and
B·H
/477
have Gaussian units
erg/cm
3
.
R.
B.
Goldfarb and F. R. Fickett, U.S.
De~artment
of
Commerce, National Bureau
of
Standards, Boulder, Colorado 80303, March
1985
NBS Special Publication 696
For
sale by the Superintendent
of
Documents, U.S. Government Printing Office, Washington,
DC
20402
