Unit Conversion

Convert numbers between two units quickly and precisely

Molar Concentration Converter

Unit Conversion

Convert molar concentration: mol/l, mmol/l, and µmol/l

Molar concentration, also called molarity, states how many moles of a substance are contained in a given volume of solution. It's stated in mole, millimole, or micromole per liter, milliliter, or microliter – 1 mol/l corresponds to a 1-molar (1 M) solution.

Key conversion factors:

  • 1 mole per liter (mol/l) = 1,000 millimoles per liter (mmol/l)
  • 1 millimole per liter (mmol/l) = 1,000 micromoles per liter (µmol/l)
  • Conversion to mass concentration: c (mol/l) = ρ (g/l) / M (g/mol)

Applications:

  • Analytical chemistry: titration, pH calculations, and equilibrium reactions
  • Biochemistry: enzyme kinetics and substrate concentrations
  • Lab medicine: blood electrolyte concentrations, e.g. sodium, potassium, or glucose in mmol/l

The molar concentration converter supports chemical calculations and lab analysis. For dilution calculations using c₁·V₁ = c₂·V₂, the dilution calculator is also available; for converting to mass concentration, the mass concentration converter.

Frequently asked questions about converting molar concentration

A 1-molar solution contains 1 mole of the dissolved substance per liter of solution, i.e. 1 mol/l. The term "molar" (M) is a common shorthand for mol/l in labs and textbooks.

Multiply the molar concentration (mol/l) by the substance's molar mass M (g/mol) to get the mass concentration (g/l): ρ = c * M. For the reverse direction, divide by M accordingly.

Physiological blood concentrations, such as glucose or electrolytes, are typically in the millimole range. mmol/l avoids unwieldy small decimal numbers, making lab values easier to read and compare.