Mass Ratio

Here the ratio of the masses of molecules or atoms can be calculated. Please enter the empirical formula of two molecules, the entry format is similar to the molecular mass calculator. The amount of each molecule can be specified; if this is omitted, 1 is assumed as the amount. Both molecular masses and the ratios to each other will be calculated.

Examples: The water molecule H₂O has a mass ratio of oxygen to hydrogen of 7.94. In air, which is about 78.1 percent nitrogen (N₂) and 20.9 percent oxygen (O₂), the ratio is 3.27.