O-Ring Sizing Calculator

Calculate O-ring ID, cross-section, and groove dimensions per AS568 standards

Input Parameters

Results

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O-Ring ID
in
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Cross Section
in
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Groove Depth
in
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Groove Width
in

Reference

AS568 O-Ring standard sizes Groove depth ~ 87% of cross section (for ~25% squeeze) Groove width ~ 1.28× cross section Backup rings needed above 1500 psi