Hardness Conversion Calculator

Convert between Rockwell C, Brinell, Vickers, and Knoop hardness scales with estimated tensile strength.

Hardness Value

From Scale

Rockwell C (HRC)

45 HRC

Brinell (HB)

665 HB

Vickers (HV)

1,104 HV

Knoop (HK)

1,159 HK

Est. Tensile Strength

2,295 MPa

How to Use This Calculator

Enter the Hardness Value — the measured number from your hardness tester.
Set the From Scale: 1 = Rockwell C (HRC), 2 = Brinell (HB), 3 = Vickers (HV), 4 = Knoop (HK).
The calculator instantly converts to all other hardness scales using ASTM E140 correlation tables.
Review Est. Tensile Strength (MPa) to cross-reference mechanical property specifications.
Use results to verify incoming material certifications or select heat treatment parameters.

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