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Direct-current circuits
Specific resistance
resistance of conductor
R =
Ω
x
μΩ
mΩ
Ω
kΩ
MΩ
GΩ
TΩ
specific resistance of conductor material
ρ =
Ω·m
x
nΩ·m
μΩ·m
mΩ·m
Ω·m
kΩ·m
MΩ·m
GΩ·m
Ω·cm
Ω·mm
2
/m
conductor length
l
=
m
x
Å
nm
μm
mm
cm
dm
m
km
n mile
in
ft
yd
conductor section
S =
m
2
x
mm
2
cm
2
dm
2
m
2
km
2
a
ha
in
2
ft
2
yd
2
1. Define values of all variables, besides sought quantity
2. Change units if necessary
3. Click "Calculate"
