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By Trelleborg Sealing Solutions

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Trelleborg’s “Unit and Hardness Converter” helps you convert frequently used units and currencies in an efficient and convenient way. Also, the app comes with a Hardness Converter based on ISO and ASTM Standards to convert between popular hardness scales for various material types.

• Easy-to-use interface
• Currency converter with in-app exchange rate update functionality
• Over 250 engineering and scientific units in 22 categories
• Hardness Converter with 16 conversion tables based on ASTM E140-07 and ISO-18265 for quick conversion between different scales
• Videos: features the automatically updated Trelleborg Sealing Solutions YouTube library

• Area
• Currency
• Current
• Data
• Density
• Distance
• Dynamic Viscosity
• Energy
• Force
• Frequency
• Kinematic Viscosity
• Moment of inertia
• Power
• Prefixes
• Pressure
• Speed
• Strength
• Temperature
• Time
• Torque
• Volume
• Weight

additionals dimensions as in-app purchase:

• Toggle between units
• Timezone conversion
• Clothing sizes
• Shoe sizes
• International power plugs

Hardness scales included:
• Rockwell (HRC, HRA, HRD, HRF, HRG, HRE, HR-15-N, HR-30N, HR-45-N, HR45-T, HR-15T, HR-30T, HR45-T)
• Brinell (HBW, HBS)
• Vickers (HV,
• Knoop (HK)
• Sceleroscope
• MPa

“Unit and Hardness Converter “is available in English and German.

What's New in Version 2.5

- bugfix: updating exchange rates works again


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Customer Reviews


I use this app nearly everyday! I have used this app for several years now and it's very handy for whatever I may need a simple conversion for. If I have a question on a certain conversion on one thing or another, chances are, I can get a quick answer in seconds to finish any project I may be involved in.

My only gripe, and it's a small one, is I wished it had a regular calculator included with this app. If it did, it would save me more time by not having to leave the app and open the calculator app, doing the calculations, and then returning for any other conversions I may have. If this app had that, it would be one of the best apps out there IMO... But it's been a life saver for me nonetheless.


An outstanding and useful app.
As a senior design engineer I am always on the prowl for tools on the go and this is again another one in the Trellenburg line up of engineering support apps that found a permanent spot in my engineering apps folder. Thank you to the apps group that puts this together!

After upgrading the version it started crashing

Any solution? I have iPhone 4 and before upgrading it worked fine, but unfortunately after upgrading it crashes every time??!!!

View In iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Utilities
  • Updated: Dec 18, 2013
  • Version: 2.5
  • Size: 15.1 MB
  • Languages: English, German
  • Seller: Trelleborg Sealing Solutions Germany GmbH

Compatibility: Requires iOS 5.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.

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