Calculator

O-Ring Dimension Calculator

Use two nominal dimensions to calculate the third. The geometry is simple; installation design is not.

Geometry

O-Ring dimension calculator

Inside diameter (ID)

Cross-section (CS)

Outside diameter (OD)

Enter two dimensions and choose the missing dimension.

OD = ID + 2 × CS

CS = (OD − ID) / 2

ID = OD − 2 × CS

All three formulas use free-state nominal dimensions.