Design springs where you want, when you want with the web-based pay as you go Spring Calculator from IST - the International Independent Centre of Excellence for Spring Technology

Compression spring calculations

IST's Spring Calculator is a fully featured web application, allowing you to perform advanced spring validation and design.


No need to worry about installation, maintenance, updates etc. Your application is hosted and maintained by us, so you always have the latest version!


On the road? No problem! All you need is access to a web browser, and you have the Spring Calculator (and all your saved work) at your fingertips.


Share a spring design in seconds, and invite a colleague, customer or client to view or edit your work. If they don't have a login, they can create one in seconds.


We've all lost data, either through hardware failure or just fat fingers! But you can rely on our servers to look after your work.


IST Spring Calculator is fully compatible with all main browsers and operating systems. So whatever you use, the chances are it will work just fine!