





Calculate the Length of a Spiral (Coil)


The following equation is used to calculate the length of the spiral:
Length = sqrt( ( (pi * Diameter * # of turns)^2 + (Pitch * # of turns)^2) ) )

Enter Spiral (Coil) Info Below:
Units are set at millimeters, the result will be in mm AND inches.







Units used:
Outside Diameter of the Spiral:
# of Turns of the Spiral:
Pitch* of the Spiral:


* Pitch is the distance between turns or loops












