O-Ring Size & Groove Calculators
Online O-ring calculators for groove design, squeeze, stretch, gland fill and extrusion checks across common seal configurations and tolerance limits.
O-Ring Size Calculator
Calculate OD from ID and cross-section and compare the nearest standard sizes.
OpenRadial Static Seal
Squeeze and gland fill check for radial static O-ring seals.
OpenRadial Dynamic Seal
Squeeze, fill and friction check for hydraulic and pneumatic dynamic seals.
OpenFace Seal
Axial-compression face seal groove verification.
OpenBoss Seal
Straight-thread tube-fitting (boss) O-ring seal check.
OpenCrush Seal
Crush-groove seal verification.
OpenDovetail Groove
Retaining dovetail face-groove design check.
OpenRounded Rectangle
Non-circular rounded-rectangle face seal geometry model.
OpenExtrusion Check
Gap and pressure driven extrusion risk assessment.
OpenChoose a calculator by engineering question
Need squeeze or gland fill?
Start with the radial static, radial dynamic or face-seal tool and match the model to the real assembly direction.
Need to select an O-ring size?
Compare standard candidates, then verify the selected size in the seal-specific calculator.
Concerned about pressure extrusion?
Use the seal calculator with verified clearance, pressure, temperature and material hardness.