Conical Coil Inductance Calculator

For Calculation of inductance of Conical type coils, simular to this one shown here
Here is Formula: (((N * R) * (N * R)) / ((8 * R) + (11 * W)))-D
Formula, Copyright © 2007

N
Number
of
Turns
R
Avg.
Radius
(inches)
W
Linear
Width of Coil
(inches)
D
Outside
Diameter
(inches)
L
Calculated
Inductance
(uH)