Mass Wizard — Every Element & Compound

🔎

Molar mass

H2O

Water

18.015g/mol

Atom-by-atom breakdown

OOxygen × 115.999 g

88.8%

HHydrogen × 22.016 g

11.2%

Grams → moles

— mol

n = m ÷ M · particles = n × 6.022×10²³

★ Most searched molar masses

399 elements and compounds searchable — or type any formula, including brackets and hydrates like K4[Fe(CN)6]·3H2O.