Common features are listed at the bottom of the Home Page
This is one of the two spring types for which no "Design from Scratch" procedure has been developed.

Conical helical compression springs are often used to provide a low solid height, or to increase lateral stability, or to provide a variable spring rate. Necessary inputs include the small end inside diameter, the large end outside diameter, the wire diameter, the free length and the number of active coils. For steady loads, the upper loaded height is entered and entry of a second working height allows the fatigue life to be estimated.

Pressing the calculate button on the input form produces messages advising of missing or illogical entries that must be attended to before the output screen appears. Then, if applicable, you will be advised of height conflict (solid height greater than input working height), high or low spring index and/or possibility of excessive stress. Pressing OK on these messages allows you to see the Analysis screen and you can accept the results as shown, or press the Review Input button to make changes on the input screen and then press Calculate again. You can repeat this interactive procedure as many times as required to obtain a satisfactory result.