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Testimonials from Download.com:

"Outstanding program!

You won't find a better converter than this. This is an excellent program, and I thank the creator of it for sharing it!"
- by mrsfixit on Oct 4, 2010


"AWESOME

Pros: I've been wanting a unit converter for years. I've used Download.Com for years for all kinds of programs but only today did I take the time to look for a unit converter and the first one I tried, Quad-Lock Unit Converter 5.3 EXCEEDED my expectations. It is so very simple to use." [..]
- by healerbear on Mar 21, 2008


"Easily one of the most useful utilities to have

Pros: Easy to install - literally takes seconds. Very simple to use. Has pretty much any unit you can think of, and you can always add your own.
Cons: Can't see any cons
Summary: This should come pre-installed on all computers like the calculator does"
- by Lghtspdr, May 22, 2009


"Must have for every day use

Pros: -easy to start and handle
Cons: -no cons at this moment
Summary: -it is exactly what I need and expect"
- by rasvan.barsa, Oct 14, 2008


"Fantastic!

Pros: Free, you can add your own categories and units. Extremely simple. I added shekels to the mass category, and made my brother the base unit in the category "Stupidity" Fantastic!"  [..]
- by thomasl714 on April 5, 2009


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Unit Converter - Easy Conversion of Measurements

Quad-Lock Unit Converter is a freeware tool that can take care of all your unit conversions within seconds. It contains more than 1000 units of measurement commonly encountered while solving engineering or everyday conversion problems. It includes a Search function to quickly find units, support for adding custom units, and a smart input box that evaluates calculations & complex expressions. Only the most common units are visible by default (e.g. Area, Distance, Temperature, Velocity) but hundreds more are included and easily found using Search.

Distinctive Features:

  1. Simple & clean user-interface makes the learning curve non-existent to convert most measurements under the sun, even for inexperienced computer users.
  2. Fast and time efficient. There is no need for an installation package, no splash screen, and no silly registration or survey forms. The program is launched in less than a second, a Search function makes it easy to find any unit (even hidden ones), and conversions are performed instantly while typing input.
  3. The program can be run from a USB drive as a completely portable application, without leaving any personal data or registry settings behind.

100% spyware and adware free

 

Download Beta
Version 6.0 for Windows

Please send your suggestions!

Requires:

Windows Vista/7/8/8.1

Beta Version:

6.0 -see updates under Version History below

File Size:

1.54 MB (1,617,920 bytes)

MD5 Hash:

D964F066DA6901DF4E052C4D116D61E0

 

Download Prior Version
Unit Converter 5.4 for Windows

View the Manual (pdf) or send your suggestions!

Author:

Manu Mital (THANKS!)

License:

Free

Requires:

Windows 2000/XP/Vista/7/8/8.1

Version:

5.4

File Size:

252 kB (258,560 bytes)

MD5 Hash:

2C0C64FCDDAFA65689BAA255A626D7BB

 

Complete Terms of Use

Excerpt: This Site, the Materials and information accessible through this Site and the Software are provided "as is" without any representation or warranty, express or implied, of any kind, and Quad-Lock, its affiliates and their suppliers hereby disclaim all warranties and conditions with regard thereto, including, but not limited to, all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement, and those arising by statute or otherwise at law, or from a course of dealing or use of trade. Quad-Lock does not warrant that this Site or the Software will operate without interruptions or that it will be error free.

Notes:
Customizations
: For custom units and preferences to be stored, a small file named UnitConverter.ini (or after the name of your exe file) is written to the %APPDATA%\UnitConverter folder or, if running from a removable drive, to the removable drive's root folder. You can transfer this file to other computers to transfer customizations.

Version History

Version 6.0:

  • Added Conversion History providing quick access to the 25 most recent unit conversions.
  • Added a ribbon menu with customizable quick access toolbar, and dockable windows for Search and the new Conversion History.
  • Added new category Currency with 38 world currencies. For the built-in currencies, the conversion rates are dynamically updated from the web (once per day) or by clicking the status bar or under menu Edit > Preferences > Currency tab.
  • Added ability to resize the window, e.g. to view more units
  • Added new category Permeability with 4 units.
  • Added cubic millimeters to Volume category.
  • Added 'Clarke 1866 (NAD 27)' to Coordinate transformations.
  • Added the name of the currently selected category to the window title (for easy task-switching when running multiple windows).
  • Minor revisions and corrections of several unit conversion factors in torque, pressure, and volume categories to improve accuracy of results.

Version 5.4:

  • Added ability to perform coordinate transformations from latitude/longitude to UTM (and vice-versa).
  • Added Heat Flux conversion category with 25 units
  • Added Magnetic Flux conversion category with 14 units
  • Added Volumetric Heat Generation category with 11 units
  • Added 6 new units to Fuel Consumption category (non-linear conversions such as Liters/100km to Miles/Gallon)
  • Corrected conversion factor in Amount of Substance; 1 mol = 1000 mmol, showed 1000000 mmol
  • Re-organized main menu. Also, added an icon next to each menu item.
  • Quad-Lock Converter now uses Unicode for the entire program (UI controls and the engine), enabling internationalization.
  • Removed restrictions such that users can now add an un-limited number of custom units and categories. Furthermore, users can also add non-multiplicative unit conversions (such as from Liters/100km to Miles/Gallon)
  • Changed location of UnitConverter.ini (preferences file) to the %APPDATA%\UnitConverter folder or, if running from a removable drive, to the removable drive's root folder (e.g. F:\UnitConverter.ini).
  • User defined custom categories can now be rendered visible or invisible in the main window using Main Menu > Edit > Preferences
  • The conversion engine now uses a hash table to efficiently map unit names to associated conversion factors. This should improve speed on old and obsolete computers (the difference may not be noticeable on fast modern computers).

Version 5.3:

  • Added ability to 'Find' units and categories (Crtl + F)
  • Added ability to 'Invert Selected Units' (Ctrl + I or click middle icon)
  • Added ability to enter additional complex expressions in the Input Box, e.g. type: sin(4e-1)+cos(sqrt(7^3)) The converter evaluates the expression to 1.3356883 before performing the conversion.
  • Added Data Transfer category with 169 units
  • Added Numbers category with 35 numerical base conversions
  • Added 3 Enthalpy categories (Mass, Molar, and Volume) with a total of 17 units
  • Added Fuel Consumption category with 12 units
  • Added Amount of Substance category with 4 units
  • Added 15 new units to Data Category
  • Added 6 new units to Torque category
  • Added 6 new units to Volume category
  • Added 3 new units to SI Prefix category
  • Added gram/liter to Density category
  • Corrected conversion factor for ton-force (2000 lbf) in Force category
  • Changed location of UnitConverter.ini (preferences file) to the root drive (usually C:)

Version 5.2:

  • Added unit abbreviations wherever applicable (displayed underneath the results)
  • Added 76 new units to "Distance" category
  • Added 33 new units in the "Time" category and changed the baseline unit to alleviate some inaccuracies
  • Added Gill (UK) and Gill (US) to "Dry Volume" category
  • Corrected the conversion factors for miles/hour-min in "Acceleration" and for hectare in "Area"
  • Changed all unit names to lowercase, except when the name is based on a proper noun
  • Updated the Quad-Lock logo
  • Added the link "Check for update or donate" under the Help Menu

Version 5.1:

  • Added input support for fractions (e.g. use 1+3/8)
  • Revised Power Category - now over 70 units
  • Added SI Prefix Category - 15 new units
  • Added Data Category - 16 new units
  • Added Surface Tension Category - 11 new units
  • Added Concentration (Liquid) - 11 new units
  • Added Concentration (Molar) - 12 new units
  • Added Inductance - 21 new units
  • Added Radiation - 19 new units
  • Added Radiation Exposure - 11 new units
  • Added "Remember last used units" in addition to category on startup (enable under Preferences)

Version 5.0: original release


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