Amidon Toroid Calculator (Iron Powder)
Inductance
[µH]
Core Size
T-12
T-16
T-20
T-25
T-30
T-37
T-44
T-50
T-68
T-80
T-94
T-106
T-130
T-157
T-184
T-200
T-200A
T-225
T-225A
T-300
T-300A
T-400
T-400A
T-520
T-650
Material
0 (brown) :: µ=1
1 (blue) :: µ=20
2 (red) :: µ=10
3 (gray) :: µ=35
6 (yellow) :: µ=8
7 (white) :: µ=9
10 (black) :: µ=6
12 (green/white) :: µ=4
15 (red/white) :: µ=25
17 (blue/yellow) :: µ=4
26 (yellow/white) :: µ=75
Inductance
[µH]
Turns
[1]
Toroid Diameter
[mm]
Frequency Range
AL
[µH/100 turns]