Trelleborg’s “Unit and Hardness Converter” converts a comprehensive list of units (incl. currencies) in an easy way.
In addition, the app has a set of other useful features on board, like timezone conversion, percentage calculations, a running pace calculator and more

What our users say:
“Have been using it forever, never tried other converter as this one does the job perfectly” - Lazareth_fr

“Fabulous resource, but also a functional masterpiece!” -Otto.

“This is needed by all engineers. So simple and easy to use” -JLa03.

• Easy-to-use interface
• Currency converter with in-app exchange rate update functionality
• Over 300 engineering and scientific conversion units in 32 categories
• Hardness converter with 16 conversion tables based on ASTM E140-07 and ISO-18265 for quick conversion between different scales
• Video library: features the extensive Trelleborg Sealing Solutions YouTube library
• Toggle between units
• Switch between dark and white theme
• Conversion history log
• Create favorite lists
• Standard calculator integrated with unit converter

• 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
• Fuel Consumption
• Glucose
• Vacuum
• Numbers
• Illumination
• Radioactivity
• Radiation (absorbed)
• Angles
• Volume Flow Rate
• Calorie
• Metric Prefixes
• Typography
• Electric Charge

• Timezone conversion
• Clothing sizes / Shoe sizes
• International power plugs
• Running pace calculator
• Percentage calculator
• Pace
• Hex, Binary, Decimal
• BMI (metric/inch)

• 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)

The app is available in English, German and Chinese languages.
Download now or contact us with any questions.

What’s New

Version 4.4

Minor bug fixes.

Ratings and Reviews

4.9 out of 5
180 Ratings

180 Ratings

798798779879 ,

It’s finally time to thank TSS.

Today, for the first time ever I think, when I opened the app it asked for a rating. I was about to dismiss it (as I do for ever other app) when I thought: “Hey... I’ve been using this flawlessly designed and ad-free app since 2012, and gotten so much use out of it, and they’ve never asked anything in return.”

So here I am. Thanks Trelleborg Sealing Solutions! Five stars for you. Give the app devs a raise and keep... sealing stuff... or whatever it is you do.

oneman_onebeard ,

Ecstatic to own it, proud to review it

I don’t review apps, however, Converter has been such an important app for me I felt it deserved my review. It meets both requirements for an app (let alone a utility app) of being very user friendly and functional. I would say the functionality stands out the most. Every conceivable conversion I’ve ever needed I’ve found in the app and that barely scratched the surface in terms of how many different dimensions are available.

Almour 46 ,

Excellent app

I have been using this app for several years and it is truly great. Whatever the conversion, it works very quickly and more importantly, it has proven to be extremely accurate. This of course is crucial with currency conversions. I have no hesitation in recommending it.


Trelleborg Sealing Solutions Germany GmbH
43.1 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, German, Japanese, Simplified Chinese

Age Rating
Infrequent/Mild Medical/Treatment Information
Infrequent/Mild Mature/Suggestive Themes


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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