Welcome to The Hardness Calculator, an online tool for fast, simple, and reliable evaluation of Vickers hardness. The application uses a gradient boosting regressor to predict Vickers hardness directly, and a gradient boosting classifier to estimate hardness indirectly by selecting among well-known empirical hardness models.

Input variables:

Bulk modulus (B)

GPa

Shear modulus (G)

GPa

Young's modulus (E)

GPa

Poisson's ratio (\(\nu\))

Optional input variables:

Crystal System --- Cubic Hexagonal Monoclinic Orthorhombic Tetragonal Triclinic Trigonal

Bandgap --- Insulator Semiconductor Metal

Density --- Low Medium High

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