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

Mass Kilograms (kg)

Required number input.

Gravity Meters Per Second Squared (m/s²)

Required number input.

Before Height Meters (m)

Required number input.

After Height Meters (m)

Required number input.

Absorbed impact energy from pendulum potential-energy loss m g (hbefore−hafter); not a material toughness conversion. 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]

Absorbed Joules (J)

The resulting absorbed joules returned as a number.

• Charpy energy is specific to specimen size, notch, orientation, temperature, machine, and test standard. It is not a direct fracture-toughness value and should not be transferred between materials or thicknesses without an established correlation.
• 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.

• Laser Cutting Power

  Ideal absorbed laser power from required energy per cut length and cutting speed; laser efficiency is not included.

• Fracture Toughness Stress Intensity

  Mode-I stress-intensity factor KI=Yσ√(πa) for a supplied geometry factor; not a fracture or safety assessment.

• Solar Heat Gain Coefficient

  Solar heat-gain coefficient from transmitted solar heat plus inward-flowing absorbed heat divided by incident solar energy.