Moles, Mass & Chemical Formulas Calculators

Convert between mass, moles and particle counts, and derive composition and formulas from analytical data. These are the foundational conversions every other chemistry calculation depends on.

4 calculators in this category

Which one do you need?

Molar Mass Calculator
Enter any chemical formula and get its molar mass in g/mol, the mass each element contributes, and the moles in your sample. Handles brackets and hydrates.
Moles to Grams Calculator
Convert moles to grams or grams to moles for any substance. Enter a formula or a molar mass and get the mass, the amount in moles and the particle count.
Percent Composition Calculator
Enter a chemical formula and get the mass percent of every element, the grams per 100 g, and the grams in your sample. Checks CHN data and fertiliser grades.
Empirical Formula Calculator
Turn element percentages or masses into an empirical formula. Shows the mole ratio, the whole-number scaling step, and the molecular formula if you know the mass.

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