ChemWeight app for iPhone and iPad

ChemWeight is a high-quality molecular weight calculator for the iPhone and iPod Touch.

With ChemWeight, you enter chemical formulas using a convenient, customizable keypad. The keypad format makes formula entry simple and quick. (Infrequently entered symbols are accessed from a pop-up list.)

You can use both atomic symbols and common organic group symbols to construct formulas. Elements 1 through 118 and deuterium are available, along with eighteen common organic substituents and protecting groups.

You can choose between standard or monoisotopic atomic weights and select the number of decimal places reported. Tap the top of the screen to reveal the chemical composition (percent by weight) and total atom counts. Swipe left or right to erase the formula.

If you need to calculate molecular weights for oligonucleotides or peptides in addition to small molecules, you might consider our alternative app, MolWeight, which calculates other useful macromolecular properties in addition to molecular weight.

If you find ChemWeight useful, please leave an App Store review!