Hardness Scale Converter

Convert between different hardness scales including Mohs, Rockwell, Vickers, and Brinell. Essential for materials science, metallurgy, and quality control.

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Common Conversions
Quick access to frequently used conversions
Unit Information

Scientific Units

Scientific and technical measurements

HV
scientific
Vickers Hardness
Vickers hardness test using diamond pyramid indenter
HRC
scientific
Rockwell C
Rockwell C scale for hard materials (steels, hard alloys)
HRB
scientific
Rockwell B
Rockwell B scale for softer materials (brass, aluminum)
HRA
scientific
Rockwell A
Rockwell A scale for very hard materials (cemented carbides)
HB
scientific
Brinell Hardness
Brinell hardness test using steel ball indenter
Mohs
scientific
Mohs Hardness
Mohs scale of mineral hardness (1-10)
HK
scientific
Knoop Hardness
Knoop hardness test using elongated diamond indenter
Shore A
scientific
Shore A
Shore A durometer for soft materials (rubber, plastics)
Shore D
scientific
Shore D
Shore D durometer for hard materials (hard plastics)
Preferences

Common Use Cases

  • Materials Scientists: Convert between hardness scales for research and analysis
  • Metallurgists: Compare hardness values across different testing methods
  • Quality Control: Verify hardness specifications in manufacturing
  • Engineers: Select appropriate materials based on hardness requirements
  • Students: Learn about different hardness testing methods

Hardness Scales

Rockwell Scales

HRC (hard materials), HRB (softer materials), HRA (very hard materials)

Vickers & Brinell

Precise hardness testing using diamond pyramid and steel ball indenters

Mohs Scale

Mineral hardness scale from 1 (talc) to 10 (diamond)

Shore Durometers

Shore A (soft materials), Shore D (hard materials)

About Hardness Scale Conversion

Hardness is a measure of a material's resistance to permanent deformation, particularly indentation. Different hardness testing methods use various indenters and loads, resulting in different scales that aren't directly comparable without conversion.

The Vickers hardness test uses a diamond pyramid indenter and is often used as a reference standard. Rockwell tests use different indenters and loads for different material ranges, while Brinell uses a steel ball indenter. The Mohs scale is qualitative and based on scratch resistance.

Our converter provides accurate conversions between these scales, accounting for the different testing methods and material properties. This is essential for comparing hardness values across different testing standards and selecting appropriate materials for specific applications.

⚠️ Important Notes

Conversion Accuracy: Hardness conversions are approximate and depend on material properties.
Material Dependence: Different materials may have varying conversion factors.
Testing Conditions: Temperature, humidity, and testing conditions affect hardness values.
Standards: Always refer to official testing standards for critical applications.

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