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Molarity and Molality Calculator

Calculate molarity, molality, or density-based conversions with explicit solution and solvent denominators.

Mode

Used when amount is entered as mass.

Required for conversion unless a formula is entered.

Molarity

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Molality

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Calculation summary
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M = n / L solution; molality = n / kg solvent How?

How this is calculated

Molarity divides moles of solute by liters of total solution. Molality divides moles of solute by kilograms of solvent. Density conversions use a one-solute model and require both solution density and solute molar mass.

Formula: M = n / L solution; molality = n / kg solvent

See Sources below

Sources

  1. IUPAC Gold Book, amount concentration. IUPAC. Retrieved .
  2. IUPAC Gold Book, molality. IUPAC. Retrieved .
  3. OpenStax Chemistry 2e, Molarity. OpenStax. Retrieved .
  4. OpenStax Chemistry 2e, Other Units for Solution Concentrations. OpenStax. Retrieved .

Method last reviewed

How we choose and check our formulas