Type a chemical formula such as H2O, Ca(OH)2 or CuSO4·5H2O to get its molar mass, the share of each element and moles from a mass.
loading toolHow to use the molar mass calculator
- Type your numbers in the boxes (pick your currency or units if asked).
- The answer updates as you type: no button to press.
- Copy the result, or share it on WhatsApp with one tap.
Questions
Why does Co give a different answer from CO?
Co is cobalt; CO is carbon + oxygen. Element symbols start with a capital letter.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
