IST's world leading spring design software is available in two forms. Both share the same background and pedigree, and are based on the knowledge and experience of IST, obtained through our extensive involvement with our customers and participation in ground-breaking international reseach projects.

Spring Calculator Professional

Spring Calculator Professional is our flagship product; it has been developed from our significant investment in technical research, data-gathering and decades of experience.

It is available for purchase either as standalone software with a permanent licence, or on a rental basis on our cloud hosting platform (making it ideal for short-term projects) - which is also available on Mac and Linux platforms.

Spring Calculator mobile app

Our app is a user-friendly yet extremely powerful design tool, allowing you to create and analyse new compression springs or validate existing designs. One of its key strengths is the range of standards and material specifications from all over the world. Spring designs can be saved to an online account and emailed as a PDF.

Spring Calculator online

Spring Calculator is a fully-featured yet cost-effective online calculator that allows you to design six types of springs in your web browser.

Access is on a subscription basis (by the week, month or year), but your data is available when your subscription expires, meaning you can still load and view it - you just can't create a new spring design.

Free Spring Calculator

IST offer a simple but free calculator. Currently available for compression springs, it allows you to predict simple properties such as spring rate, and load at length.

If you require more functionality, consider one of the two options below.







Feature comparison

Spring Calculator Spring Calculator Professional
Overview Spring Calculator is a fully-featured yet cost-effective online calculator that allows you to design six types of springs in your web browser. Spring Calculator Professional is our flagship product; it has been developed from our significant investment in technical research, data-gathering and decades of experience.
Spring types included 6 1 Optional 2
Options available Validation only Design, optimisation and Compass (where applicable)
Pricing/licensing Fixed price on subscription basis Cost depends on options chosen. Can be installed on-premises or accessed remotely from our cloud servers.
Materials included 219 grades of material (105 with fatigue data) 284 grades of material (190 with fatigue data)
Output formats Printable PDF Printable reports and PDF export, plus compression spring production drawing to EN 15800.