Compression Spring is an open-coil springs which is wounded to oppose compression along with the axis of the wind. It is used to store the mechanical energy and its made out of spring steel. The spring is used in automotive engines, large stamping presses, medical devices, electronics and sensitive instrumentation devices. Here is online Compression Spring Wire Length Calculator to find the length of the spring wire by providing the mean diameter and total number of coils.
A compression spring wire has 5 coils and a mean diameter of 20 cm.
Wire Length = Π x D x N
= 3.14 x 20 x 5
= 314.1593 cm