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Hardness Converter HD

By Nelson Bairos

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Introducing the big brother to the Wilson Hardness Converter iPhone app.

The Wilson Hardness Converter is a simple tool for converting between popular scales used to measure the hardness of metallic materials.

The hardness of a material can correlate to tensile strength, wear resistance, ductility, and other physical characteristics.

✔ Convert between popular Rockwell, Vickers, Knoop, and Brinell hardness scales.
✔ Cylindrical and Spherical corrections for Rockwell scales.

Available Scales:
❑ HR15N
❑ HR30N
❑ HR45N
❑ HR15T
❑ HR30T
❑ HR45T
❑ Knoop
❑ Vickers
❑ Brinell

Note: This tool should be used for reference only.

This tool is sponsored by Wilson Hardness, please visit for more information.

Developed by Nelson Bairos -

iPad Screenshots

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Customer Reviews

ASTM E 140

It is not clear if this conversion program coincides with ASTM E 140 and as such it's usefulness is in question especially when compliance with NACE MR0175 is mandated.

Hardness Converter HD
View in iTunes
  • Free
  • Category: Utilities
  • Released:
  • Version: 2.2.0
  • Size: 9.8 MB
  • Languages: English, Danish, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Swedish
  • Seller:

Compatibility: Requires iOS 4.3 or later. Compatible with iPad.

Customer Ratings

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