Spring coefficient calculation

The spring coefficient describes the amount of spring force produced by a unit variable.
The spring coefficient calculation mainly calculates the spring force when the spring is extended (or shortened) by unit length.
Calculation formula reference: Hooke's law.
Use example
Input data: the diameter of the spring wire is 0.5 inch; the diameter of the outer side of the spring is 0.8; the number of effective coils is 10, click “Calculate” to display the result.
Output: The spring rate is 332,754.629 lbs/in, which is also equal to 5,952,667,673 kg/mm.
Precautions
The spring wire diameter input value should be in the range of 0.1-1.