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Molar Concentration Converter

Convert molar concentration units including mol/L, mmol/L, μmol/L, mol/m³ for chemistry and biochemistry calculations.

What this tool does

Convert molar concentration units including mol/L, mmol/L, μmol/L, mol/m³ for chemistry and biochemistry calculations. Type an amount in moles per liter (molar), choose the units, and the tool converts it to millimoles per liter (millimolar). It offers 7 molar concentration units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Mole per liter (molar), Millimole per liter (millimolar), Micromole per liter (micromolar), Nanomole per liter (nanomolar), Mole per cubic meter, Kilomole per cubic meter, Mole per milliliter. Starts as Mole per liter (molar).
  • To: Choose one of the same 7 units as "From". Starts as Millimole per liter (millimolar).

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from moles per liter (molar) to millimoles per liter (millimolar):

  • 1 mol/L = 1,000 mmol/L
  • 5 mol/L = 5,000 mmol/L
  • 10 mol/L = 10,000 mmol/L
  • 50 mol/L = 50,000 mmol/L
  • 100 mol/L = 100,000 mmol/L

Multiply the number of moles per liter (molar) by 1,000 to get millimoles per liter (millimolar). Both units are exact definitions, so 1,000 is the exact factor: 1 mol/L = 1,000 mmol/L.

Sources: Mole per liter (molar): exact by definition. Millimole per liter (millimolar): exact by definition.

Limitations

  • Converts molar concentration only. It does not convert to mass concentration (g/L), which needs a molar mass.

FAQs

Q: How do I convert mol/L to mmol/L?
A: Enter the value, choose mol/L as the From unit and mmol/L as the To unit. The result and the other units in the list update immediately. To go the other way, swap the two units.
Q: Is mol/L the same as molar (M)?
A: Yes. One molar (1 M) is one mole per liter, and millimolar and micromolar are thousandths and millionths of that.
Q: Is kmol/m³ the same as mol/L?
A: Yes. A kilomole per cubic meter equals one mole per liter, because both the amount and the volume are scaled by 1,000.

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