Quad-Lock Unit Converter

Unit Converter is a freeware tool that can take care of all your unit conversions even when offline. It has an easy-to-use interface and contains more than 900 units commonly encountered while solving engineering or everyday conversion problems. Other features include a function to Find Units and a Smart Input box that evaluates fractions, complex expressions etc. Everything is built into a single executable file so no uninstaller is necessary. Its small file size makes it easy to distribute among friends and co-workers.

Download the free Quad-Lock Unit Converter (FTP download)

100% spy-ware and ad-ware free (will not connect to any servers unless you click on links/logos)

Write us about the Quad-Lock Unit Converter or use the button below to donate to the developer.

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 root folder on your computer (usually C:\ ). Write Access Privileges are required accordingly. You may transfer this file to other computers to transfer customizations.

Version History:
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