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Hardness Converter

Hardness Converter

by Buehler LTD.

4 ratings
9 reviews
🔧 Utilities
🔍 Reference

Archived App (Last seen on 4 Apr 2026)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated
  • May 20, 2010
  • February 27, 2021

Features

Developer

Buehler LTD.
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Hardness Converter screenshot #1 for iPhone
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Hardness Converter screenshot #3 for iPhone
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❓8 answered
FAQ↘︎
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About

This utility app converts between various metallic material hardness scales, including Rockwell, Vickers, Knoop, and Brinell. It also provides cylindrical and spherical corrections for Rockwell scales, referencing the latest ASTM and ISO tables.

✓Converts between Rockwell, Vickers, Knoop, and Brinell scales
✓Includes cylindrical and spherical corrections for Rockwell
✓References latest ASTM and ISO tables
✓Supports numerous Rockwell sub-scales (HRC, HRB, HRA, etc.)
✓Provides reference for material properties correlation
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What's New in Hardness Converter

2.4.2

February 27, 2021

Updated to conform to new Apple app store guidelines.

User reviews

Most RecentHighest RatedLowest Rated

Fantastic app

Thank you for updating this app, I was afraid it may be scrapped for iOS 11. I use this app all the time, it's simple, straightforward & fast.
BobdhdBobdhd

Never Use a Wall Chart Again

This app has everything most engineers could want regarding hardness conversion. The built-in roundness correction is also a nice touch. The only deficiency I can see is that the Knoop and Vickers hardnesses are not explicitly stated as macro- or microhardness, although that is the case for ASTM A370 and I can't be too mad about that.
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pilot_2023pilot_2023

Engg consultant

Great work! Really nice and handy app.
Sahil BelgaonkarSahil Belgaonkar

Nice app

Installed the app this morning and have already been using it often. Very handy.
Tim SchusterTim Schuster

User

I was disappointed because the conversions did not match the values of the Wilson chart.
Steelady13Steelady13
See 4 more reviews

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FAQ

What scales does Hardness Converter support?

Hardness Converter supports a wide range of scales including HRC, HRB, HRA, HRD, HRE, HRF, HRG, HRK, HR15N, HR30N, HR45N, HR15T, HR30T, HR45T, Knoop, Vickers, and Brinell.

Does Hardness Converter offer any corrections?

Yes, Hardness Converter includes cylindrical and spherical corrections specifically for Rockwell hardness scales, based on the latest ASTM and ISO tables.

Is Hardness Converter free to use?

Yes, Hardness Converter is completely free to download and use. It does not have any in-app purchases or advertisements.

What devices is Hardness Converter available on?

Hardness Converter is available for iPhone and iPod devices.

How often is Hardness Converter updated?

The latest version of Hardness Converter is 2.4.2, which was last updated on February 27, 2021. Users can expect updates to reflect current standards.

What is the age rating for Hardness Converter?

Hardness Converter has an age rating of 4+, making it suitable for a wide audience.

What is the user sentiment for Hardness Converter?

Based on available data, Hardness Converter has a perfect rating of 5.0 stars from 4 ratings, indicating very positive user sentiment.

Does Hardness Converter have ads?

No, Hardness Converter is ad-free. It provides a clean user experience without any advertisements.