분자량 계산기

Calculate molecular weight (molar mass) from any chemical formula. Supports parentheses, hydrates, and complex compounds. Free, fast, and easy to use.

Enter Formula

Use proper capitalization: H2O (not h2o). Use · or * for hydrates.

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.

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분자량이란 무엇입니까?

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.

공식

분자량: MW = Σ (Atomic Weight × Count)

Mass %: % = (Element Mass / MW) × 100

Supported Formula Formats

Simple Formulas

H2O, CO2, NaCl, Fe2O3 — 단지 원소와 첨자일 뿐입니다.

Parentheses

Ca(OH)2, Al2(SO4)3 — 승수가 있는 그룹.

Hydrates

CuSO4·5H2O — use · or * for dot notation.

Complex Compounds

C8H10N4O2(카페인), C9H8O4(아스피린) 등

Common Molecular Weights

• H2O(물) = 18.015g/mol

• CO₂(이산화탄소) = 44.009g/mol

• NaCl(식용소금) = 58.443 g/mol

• C₆H₁₂O₆(포도당) = 180.156 g/mol

• Ca(OH)²(수산화칼슘) = 74.093 g/mol

• C₈H₁₀N₄O₂(카페인) = 194.190g/mol

• C₂H₅OH(에탄올) = 46.069 g/mol

중요 사항

  • Element symbols are case-sensitive: Na (sodium) vs NA (invalid).
  • Parentheses must be properly balanced.
  • 원자량은 IUPAC 표준 값입니다.
  • Mass percentages always sum to 100%.

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