Online molar mass calculator / molecular weight calculator (MW) for a chemical formula with letter case correction and multi-section formula

Molar Mass of Water
Molecular Weight of H2O


Formatted Formula


Empirical Formula


Molar Mass




Definitions used in Online Molar Mass Calculator

Chemical Formula: is a way of presenting information about the chemical proportions of atoms that make up a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses
Empirical formula: In chemistry, the empirical formula of a chemical compound is the simplest positive integer ratio of atoms present in a compound
Mole in chemistry: The mole (symbol: mol) is the base unit of the amount of substance ("number of substance") in the International System of Units or System International (SI), defined as exactly 6.022 140 76 × 10^23 particles of entities (atoms, molecules, ions or electrons ...)
Declaimer: This info is for reference only with no grantee of its accuracy

About and Support

This application calculates MW for any chemical formula such as H2O, CaCO3 …. It has a built-in case correction so you could write h2o when you mean H2O It also can calculate the MW for multi-section formula NaBO3 . 4H2O
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