SolutionCalc is an app for undergraduate and graduate students, as well as professionals, who prepare and dilute solutions as part of their daily routine. It helps to calculate dilutions and the most common types on concentration, i.e. percentage, molar, molal and parts per million.
You can calculate the mass, concentration, volume or molecular weight.
For molar and molal calculations you can opt to enter the value of molecular weight or the formula of the substance you are working with. There is a built in list with several common substances on biochemistry and molecular biology laboratories, and you can add, edit or remove your own on the Manage Molecular Weights option.