O-Ring Calculator | Trelleborg Sealing Solutions

O-Ring Calculator

O-Ring Calculator

The online O-Ring Calculator offers engineers and professionals a quick and easy way to calculate O-Ring dimensions and the appropriate housing layout in accordance with the international O-Ring standard ISO 3601. By simply entering installation specifications for an application, it recommends O-Ring sizes, housing layout and corresponding part numbers.

You need to be registered and logged in to see the O-Ring Calculation software.
Login or register here to start the O-Ring Calculator

This tool is optimized for desktop devices. Mobile users can download the O-Ring-Calculator App here

Do you want to know how to benefit most from using the O-Ring Calculator?
Please reference the e-Learning O-Ring Calculator lesson to become familiar with its functions.

New e-Learning lesson will be available soon! 

Latest improvements:

  • Improved user interface and graphics
  • Save results directly with your Trelleborg Sealing Solutions Member account
  • Share your projects with colleagues through the calculator
  • Dynamic links to the Electronic Catalog and CAD Search tools

Other calculation functions

  • For a selection of material type and hardness the total compression forces for the O-Rings can be calculated
  • Selection of application type
  • Radial applications can be differentiated between static and dynamic
  • Axial application can be differentiated between the internal pressure or external pressure
  • Different limits for calculation results are applied
  • Warning limits accurately follow the different recommendations in accordance with ISO 3601-2

ISO Quick Search

  • The preselected application type is used as a pre-condition for the calculation – different limits are applied which lead to different results
  • This function defaults to the thickest possible O-Ring with the appropriate housing in accordance with ISO 3601


  • Modern and easy to use interface
  • Save and share calculations so they can be reviewed by others
  • In the Notes function, individual comments can be stored for each calculation for sharing with others if desired
  • Languages and unit systems can be changed during calculation and calculations initially created in one language can be converted in another. This is useful when sharing calculations with people from other countries.

You may also scan the QR-Code and download the
O-Ring Calculator App to your mobile device

O-Ring Calculator