# Constant Force Helical Compression Spring Design Calculator

#### Definition:

A constant force helical compression spring design calculator able to calculate the constant or rate of a helical compression spring design as well as safe maximum load and safe maximum travel.

Spring rate or spring constant is the "Master" when it comes to your helical compression spring design. Your helical compression spring undergoes a load while traveling down to your desired loaded height. Follow the example shown below which demonstrates the formula found in Hooke’s Law.

Ex. You have a spring that is 2” (two inches) long. You need this spring to travel 1.5” (one and a half inches) down to a loaded height of 0.5” (half inch). If you have a spring rate of 1 lbf/in (one pound of force per inch of travel), what amount of force or load will you have to apply to this spring for it travel down to your desired loaded height? Please follow the helical compression spring design formula below and view the image which will demonstrate and explain the formula.

k = F ÷ x

Where as:
k = Spring Constant (Spring Rate)