To design or search for a particular type of spring click on a picture, or see the appropriate section below.

Compression Springs
Compression Springs
Extension Springs
Extension Springs
Torsion Springs
Torsion Springs

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Middletown, NY 10940

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Extension spring Rate, IT and Free Length from Loads

Beta Test
NOTE: Calculations are independent of units. e.g. if you use english units then the results are in english units, etc.
Load Set #1 Load #1 Length #1
Load Set #2 Load #2 Length #2

Optional Extension Inputs

Free Length


Initial Tension

These calculators are intended as a convenience for engineers who understand the principles involved and are capable of making independent judgements. There is no gurantee that the springs you design here will function as expected. There is no attempt here to make judgements or allowances for material or dimensional tolereances. You need to test anything you design here in your application to make sure that it functions and that it will be safe over time. We will not be responsible for design errors or spring failures or other problems with your application.  

Check to change spring type
Compression: Extension: Torsion:



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