Molar Concentration Converter

Convert molar concentration between mol/L (M), mmol/L (mM), µmol/L (µM), and nmol/L (nM). Used in chemistry, biochemistry, and medical laboratory tests.

Common Molar Concentration Conversions

FromTo
1 mol/L (1 M)1,000 mmol/L
1 mmol/L (1 mM)1,000 µmol/L
1 µmol/L1,000 nmol/L
Blood glucose (normal)4–6 mmol/L = 72–108 mg/dL

Molar Concentration Unit Definitions

mol/L (M)
Molar — moles per liter. Standard chemistry unit.
mmol/L (mM)
Millimolar. Used in blood tests and medicine.
µmol/L (µM)
Micromolar.
nmol/L (nM)
Nanomolar. Used in pharmacology.

Frequently Asked Questions

What is a molar solution?

A 1 M (molar) solution contains 1 mole of solute per liter of solution. For example, 1 M NaCl contains 58.44 g of sodium chloride per liter.