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

Force Newtons (N)

Required number input.

Weld Length Millimeters (mm)

Required number input.

Thickness Millimeters (mm)

Required number input.

Average axial stress across a full-penetration butt weld from applied force divided by weld length and thickness. 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]

Stress Megapascals (MPa)

The resulting stress megapascals returned as a number.

• Connection capacity depends on material grades, geometry, edge distance, pretension, threads, weld quality, prying, combined actions, fatigue, corrosion, and code resistance factors. A single tensile, shear, or stress check is not a complete connection design.
• 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.

• Stress Force

  Average normal stress from an axial force divided by loaded cross-sectional area; excludes bending and stress concentrations.

• Bolt Tensile Capacity

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

• Fillet Weld Strength

  Idealized fillet weld force from effective throat area and a supplied allowable throat shear stress; excludes code factors.