| ChemCalc: Online calculator for molecular formula, molecular weight, elemental composition, and isotopic distribution. Java recommended. |
| Formol: Open source command-line molar weight calculator. C++ source code and Linux packages available. |
| 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. |
| Mole Calc: Free software for Windows for the calculation of molecular weights. Also available in French. |
| Molecular weight and elemental analysis calculator: This unix program calculates the formula weight and the element distribution for a given chemical formula. |
| Molecular Weight Calculation: Very simple web-based utility for finding the molecular mass, elemental composition, and degree of unsaturation given a chemical formula. |
| Molecular Weight Calculator: A web-based program that calculates the number of constituent atoms, molecular weight, and percent composition based on a molecular formula. |
Classical
