Molecular Weight Calculator
This program can calculate the molecular weight and percent composition of chemical formulas and amino acids, providing a graphical user interface to edit the formulas and parsing options. It recognizes user-definable abbreviations, custom elemental isotopes, and can display up to 20 compounds simultaneously. It also includes a Mole/Mass Converter, Formula Finder, Capillary Flow Modeller, Amino Acid Notation Converter, Peptide Sequence Fragmentation Modeler, Isotopic Distribution Calculator, and built-in calculator. Full program documentation is available by pressing F1 during program operation.
To install the Molecular Weight Calculator for Windows 9x/NT/00/ME/XP, run the "Molecular Weight Calculator.msi" file by double-clicking on it. The install program should take care of copying the files to the correct locations and registering all of the components. If replacing an older version, the .INI and .DAT files will be replaced. If you have abbreviations you want to save, backup the MWT_ABBR.DAT file before installing.
Note: Sometimes when upgrading from a previous version the Lang.Ini and MwtWin.Chm files do not get upgraded to the current version. For this reason, if uprgrading, please delete the Lang.ini and MwtWin.Chm files in the Molecular Weight Calculator directory before running the "Molecular Weight Calculator.msi" file. I apologize for the inconvenience but have not found a way to fix the problem using the current version of the Windows Installer. There are new versions of the installer available, but I do not want to force users to have to update their Windows Installer simply to install this software.
If you do not have the Windows Installer on your machine, the .msi file will not run and you must install the Windows Installer (it is included by default in Windows 2000 and higher). I did not include the Windows Installer as part of this download because it is an additional 1.4 MB to download. You can download the Windows Installer from Microsoft:
If running Windows 95/98, download http://download.microsoft.com/download/platformsdk/wininst/1.1/W9X/EN-US/InstMsi.exe
If running Windows NT, download http://download.microsoft.com/download/platformsdk/wininst/1.1/NT4/EN-US/InstMsi.exe
Once you have installed the Windows Installer, you should be able to run the "Molecular Weight Calculator.msi" setup file.
Written by Matthew Monroe for the Department of Energy (PNNL, Richland, WA)
Licensed under the Apache License, Version 2.0; you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0