Hardness Testing Calculators
Free interactive tools for Rockwell, Brinell, Vickers and Knoop: hardness from an impression, indentation depth, minimum thickness, permissible error and repeatability, and curved-surface corrections.
This page gathers all the ATI hardness calculators in one place. Pick a method below, enter your values, and get instant results based on the standard formulas and the ISO and ASTM verification tables. To convert a value between scales, use the interactive hardness converter; to learn the methods, see the Hardness Testing Academy.
Hardness conversion
Convert a hardness value between scales (HV, HRC, HBW, HRB and more) for steels and the main non ferrous families with the interactive converter.
Open the interactive hardness converter.
Rockwell calculators
Brinell calculators
Vickers calculators
Knoop calculators
Keep your tester accurate: verify it against certified, traceable reference blocks.