Work out hardness conversion instantly with clear inputs, formula shown and shareable results.
Hardness scales measure different indentation geometries, so conversion is empirical rather than exact. Below about 300 HB Vickers and Brinell agree within a few percent, so HV is taken as 1.05 x HB, while Rockwell C is interpolated from the standard conversion table. Tensile strength for steel follows the long-established 3.45 x HB relation in megapascals.
Vickers relation
HV = about 1.05 x HB for HB below 300
Tensile estimate
UTS MPa = 3.45 x HB (carbon and alloy steels)
Preliminary estimate only. Hardness conversions are approximate; use the standard conversion tables for the specific material and report the scale actually measured.
HV = about 1.05 x HB for HB below 300. Hardness scales measure different indentation geometries, so conversion is empirical rather than exact.
Within roughly plus or minus 5 percent for wrought carbon and alloy steels. They should not be applied to cast iron, austenitic stainless, non-ferrous alloys or case-hardened surfaces.
This calculator takes 2 inputs: Measured hardness value, Scale of measurement. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.