Le Thermal Stress Calculator is a practical engineering tool designed to quickly estimate thermal stress caused by temperature changes in restrained materials. By entering Young’s modulus, coefficient of thermal expansion, initial and final temperatures, and restraint conditions, users can calculate thermal strain and thermal stress efficiently. This calculator is useful for engineers, designers, students, and manufacturers working with metals and structural materials where thermal expansion and contraction can affect component performance, dimensional stability, and structural reliability.

Quick start: structural steel example is ready to load.

Material stiffness. Common structural steel value: 200 GPa.

For steel, use 12 µm/m·°C. Negative values are valid for negative-expansion materials.

Temperature inputs Tinitial and Tfinal

The change is calculated as final minus initial. An 80 °C change is also 80 K or 144 °F.

0 means free expansion; 1 means fully restrained expansion or contraction.