I am a Ph.D. chemist trained in synthetic organic chemistry.  I have been working for The Clorox Company for about the past twelve years, and I live and work in the San Francisco Bay Area of California.

Over the years I have written a couple of software programs for chemists, which I give away for free.

MacFormula
MacFormula is a molecular weight calculator and more.  Enter a formula and (optionally) a mass or molar amount, and MacFormula will calculate the molecular weight, % elemental composition, and either a mass or molar amount (depending upon your optional input).  Great for planning reactions.

Comes in both a Macintosh and Windows 95 version.  The Windows version is called "WinFormula."

Download MacFormula

Download WinFormula

MF Calc ("Molecular Fragment Calculator")
MF Calc will take a user defined mass and calculate all of the possible elemental combinations possible with that mass.  The program is very flexible in that the user can control the degree of the precision of the mass, as well as which elements (and the amounts) that should be included in the search.  Will calculate an exact formula from a high-resolution mass spec value.  Available in both Mac and Windows versions.

Download MF Calc (Mac version)

Download MF Calc (Windows version)