Calculation Websites

Simple online and offline calculators for boiling point at reduced pressure, unit conversion, and molecular mass.

Online exact mass calculator, mass spectrum generator, and isotope distribution calculator.

NGMSI sells software for 3-D molecular modeling, chemical database creation and manipulation, 2-D publication quality drawing, calculation of over 100 physical properties from structure, automatic chemical internet database generation, and QSAR and QSPR analysis as well as chemical databases.

Calculators for pH, solution preparation and concentration conversion, acid-base equilibrium, buffer, hydrolysis, and dilution calculations.

English version of German freeware data analysis program, for various calculations including stoichiometry, pH, thermochemistry, and kinetics.

Molar conversions and an interactive periodic table directly on the webpage. Requires JavaScript.