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.

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Do you want to know how to benefit most from using the O-Ring Calculator?

In this e-Learning lesson it is explained how to use the O-Ring Calculator in the most efficient way.
Click on the link to open the e-Learning O-Ring Calculator lesson

Latest improvements:

  • New calculation function for compression forces
  • Selection of application type
  • Improved ISO Quick Search
  • Improved usability

New calculation function

  • 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 calculations results are applied
  • Warning limits accurately follow the different recommendations in accordance with ISO 3601-2

Improved 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
  • The ‘direction’ for the calculation has changed – the calculator always suggests the thickest possible O-Ring with the appropriate housing in accordance with the ISO 3601


  • Modern and easy user interface
  • Arbitrary memory location memorize calculations so they can be moved to other computers and be shared
  • In the notes function individual comments can be stored for each calculation for sharing with other users if required
  • Languages and unit systems can be changed during calculation and calculations initially in one language can be opened in another one which is useful when sharing calculations with people from other countries