  |
Molecular Weight Calculation - http://www.chemie.fu-berlin.de/cgi-bin/molform
Very simple web-based utility for finding the molecular mass, elemental composition, and degree of unsaturation given a chemical formula. |
| |
ChemCalc - http://www.chemcalc.org
Online calculator for molecular formula, molecular weight, elemental composition, and isotopic distribution. Java recommended. |
| |
Molecular Weight Calculator - http://www.humboldt1.com/~medusa/page/molecalc/
A web-based program that calculates the number of constituent atoms, molecular weight, and percent composition based on a molecular formula. |
| |
Molecular weight and elemental analysis calculator - http://www.st.hirosaki-u.ac.jp/~rmiya/xmolwt/xmolwt-e.html
This Unix program calculates the formula weight and the element distribution for a given chemical formula. |
| |
McDalton - http://hem.fyristorg.com/ch.s/mcdalton/
Free formula mass calculator for Windows, uses the latest values of atomic weights as recommended by IUPAC. For educational purposes, shows calculations as well as the uncertainty of the result. |