Water (H2O)
Number of Hydrogen Atoms: 2; Number of Oxygen Atoms: 1; Number of Carbon Atoms: 0; Number of Nitrogen Atoms: 0
Molar Mass: 18.016 g/mol
Molar Mass Calculator
Chemistry0.0(0)
Calculates the molar mass (molecular weight) of a chemical compound or element. Enter the chemical formula to calculate its molar mass.
More tools:Science & Lab Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Number of Hydrogen Atoms, Number of Oxygen Atoms, Number of Carbon Atoms, and Number of Nitrogen Atoms in the units shown.
Step 2
Read Molar Mass in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
Carbon Dioxide (CO2)
Number of Hydrogen Atoms: 0; Number of Oxygen Atoms: 2; Number of Carbon Atoms: 1; Number of Nitrogen Atoms: 0
Molar Mass: 44.01 g/mol
Methane (CH4)
Number of Hydrogen Atoms: 4; Number of Oxygen Atoms: 0; Number of Carbon Atoms: 1; Number of Nitrogen Atoms: 0
Molar Mass: 16.042 g/mol
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