Kalkulator Berat Molekul
Calculate molecular weight (molar mass) from any chemical formula. Supports parentheses, hydrates, and complex compounds. Free, fast, and easy to use.
Enter Formula
Enter a chemical formula (e.g. H2O, C6H12O6, Ca(OH)2) and click Calculate to get the molecular weight, element breakdown, and step-by-step solution.
Rumus Kimia
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Berat Molekul
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g/mol
Perincian Elemen
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Solusi Langkah demi Langkah
Mass Percentage
Mass Contributions
Panduan Pengguna Lengkap
Apa itu Berat Molekul?
Molecular weight (also called molar mass) is the total mass of one mole of a compound, calculated by summing the atomic weights of every atom in its chemical formula. It is expressed in grams per mole (g/mol) and is fundamental to converting between mass and moles in stoichiometry, solution preparation, and analytical chemistry.
Rumus
Berat Molekul: MW = Σ (Atomic Weight × Count)
Mass %: % = (Element Mass / MW) × 100
Supported Formula Formats
Simple Formulas
H2O, CO2, NaCl, Fe2O3 — hanya elemen dan subskrip.
Parentheses
Ca(OH)2, Al2(SO4)3 — gugus dengan pengali.
Hydrates
CuSO4·5H2O — use · or * for dot notation.
Complex Compounds
C8H10N4O2 (kafein), C9H8O4 (aspirin), dll.
Common Molecular Weights
• H₂O (Air) = 18,015 g/mol
• CO₂ (Karbon Dioksida) = 44,009 g/mol
• NaCl (Garam Meja) = 58,443 g/mol
• C₆H₁₂O₆ (Glukosa) = 180,156 g/mol
• Ca(OH)₂ (Kalsium Hidroksida) = 74,093 g/mol
• C₈H₁₀N₄O₂ (Kafein) = 194,190 g/mol
• C₂H₅OH (Etanol) = 46,069 g/mol
Catatan Penting
- Element symbols are case-sensitive: Na (sodium) vs NA (invalid).
- Parentheses must be properly balanced.
- Berat atom adalah nilai standar IUPAC.
- Mass percentages always sum to 100%.