mg/mL to Molarity Calculator

Convert mass concentration to mol/L, mM and µM using molecular weight.

Calculator Inputs

Compound / Protein Concentration (mg/mL)

1 mg/mL is numerically equivalent to 1 g/L.

Molecular Weight (g/mol)

Select a preset above or enter the molecular weight manually.

Molarity

—

mol/L (M)

Millimolar—

Micromolar—

Enter values and click Calculate.

The result will appear here.

mg/mL	MW (g/mol)	Molarity (mol/L)

Molarity (mol/L) = concentration (mg/mL) × 1000 ÷ molecular weight (g/mol).

Because 1 mg/mL = 1 g/L, the concentration can be divided directly by molecular weight after converting the displayed value consistently.

Useful for chemistry, pharmacy, biochemistry, protein solutions, drugs, buffers and laboratory calculations.