Vladimir Kofman has developed VKConverter, a units converter for the iPhone. Measurements for conversion include area, length, pressure, speed, temperature, volume and weight.
Now the application is hosted on ModMyiFone.com community source (Utilities -> Converter). You should have this source by default, but here it is just in case: http://www.modmyifone.com/installer.xml

1. New measurements: Acceleration, Angle, Prefixes, Luminance, Data Transfer, Force.
2. Measurements order is now editable: Just like units order in Advanced mode.
3. Ruler: Big thanks to Billy Chasen!
4. New currency rates provider: Data provided by http://www.iccfx.com. Huge thanks to Frederic!
5. Shake to refresh currency rates: No need to go to Settings screen, just shake your iPhone!
6. New languages:
- Polish by Piotr Biegala and Tomasz Szeweluk
- Dutch by Herbert Kats
- Portuguese by Helvécio
- Traditional Chinese by Jerry
7. Scientific notation support: No more "<ε" results!
8. Standard localization support: Now I'm using Cocoa's standard localization technique (.lproj folder for each language). BTW as a side effect, you'll need to restart the application after changing the language.

Screenshots:




More info and pics @ http://code.google.com/p/iphone-converter/

I get "package download failed".

Originally Posted by ag_oo7

I get "package download failed".

Try again it works.
Or download http://iphone-converter.googlecode.c...app.-0.13b.zip
and install it manually.

Nice GUI, I'll try it!!

Congrats & Thanks

That is just a very good news !

Don't hesitate to donate, if you think this app is useful for you.

Excellent!
just what i was looking for

If you don't like the icons you can change them.
SSH to the iPhone and replace the native ones inside the /Applications/Convert.app/icons folder

And even correct settings editing the .plists in:
the /Applications/Convert.app/Settings folder

And donate if you use this app (like XianLi suggested). I already d

nice app, i like the icons!

Hey,
In the temperature conversion, it's given 0C = 274.15K but it is 273.16K. Hope that the author will change this as i don't like to edit it manually.
thanks

i think it is .15