Use this engineering calculation for a transparent preliminary estimate or independent arithmetic check when geometry, materials, loads, operating conditions, and units are defined consistently.

Projected Square Centimeters (cm²)

Required number input.

Cavity Pressure Megapascals (MPa)

Required number input.

Ideal cavity-opening force from projected area times cavity pressure; mold safety margins are not included. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Clamping Kilonewtons (kN)

The resulting clamping kilonewtons returned as a number.

• Forming-force and reduction estimates depend on material flow stress, temperature, strain rate, friction, die geometry, redundant work, anisotropy, lubrication, and machine stiffness. Process windows and defects require material-specific data or simulation.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check assumptions against drawings, measurements, current material data, and the applicable design code. Apply required load combinations and safety factors, then obtain qualified review and testing for consequential designs.

• Bolt Shear Capacity

  Nominal single-shear force from bolt shear area times a user-supplied allowable shear stress; not a code-rated connection capacity.

• Extrusion Pressure

  Ideal frictionless extrusion pressure from a supplied mean flow stress times ln(initial area/final area); actual die pressure may be higher.

• Bolt Tensile Capacity

  Nominal axial force from bolt tensile stress area times a user-supplied allowable tensile stress; excludes prying and interaction.