Molarity Converter

Convert between molarity units including mol/L, g/L, ppm, and % solution. Essential for chemistry labs, biology research, and pharmaceutical industry.

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Common Conversions
Quick access to frequently used conversions
Unit Information

Scientific Units

Scientific and technical measurements

mol/L
scientific
Molarity
Moles of solute per liter of solution (M)
mmol/L
scientific
Millimolar
Millimoles per liter (mM)
µmol/L
scientific
Micromolar
Micromoles per liter (µM)
nmol/L
scientific
Nanomolar
Nanomoles per liter (nM)
ppm
scientific
Parts per Million
Parts per million (1 ppm = 1 mg/L for dilute aqueous solutions)
ppb
scientific
Parts per Billion
Parts per billion (1 ppb = 1 µg/L for dilute aqueous solutions)
ppt
scientific
Parts per Trillion
Parts per trillion (1 ppt = 1 ng/L for dilute aqueous solutions)

Metric Units

International System of Units (SI) measurements

g/L
metric
Grams per Liter
Grams of solute per liter of solution
mg/L
metric
Milligrams per Liter
Milligrams of solute per liter of solution
µg/L
metric
Micrograms per Liter
Micrograms of solute per liter of solution
%
metric
Percentage
Percentage by weight (1% = 10 g/L for dilute aqueous solutions)
Preferences

Common Use Cases

  • Chemistry Labs: Prepare solutions with specific concentrations
  • Biology Research: Calculate reagent concentrations for experiments
  • Pharmaceutical Industry: Formulate drug solutions and standards
  • Environmental Testing: Measure pollutant concentrations in water
  • Education: Teach students about solution chemistry

Unit Categories

Molarity Units

mol/L, mmol/L, µmol/L, nmol/L

Weight Units

g/L, mg/L, µg/L

Ratio Units

ppm, ppb, ppt, %

About Molarity Conversion

Molarity (M) is a fundamental concept in chemistry that measures the concentration of a solution in terms of moles of solute per liter of solution. It's the most common way to express concentration in laboratory settings and is essential for stoichiometric calculations.

For very dilute solutions, scientists often use parts per million (ppm) or parts per billion (ppb). One ppm equals 1 mg/L for dilute aqueous solutions, while one ppb equals 1 µg/L. These units are particularly useful in environmental chemistry and toxicology where concentrations are extremely low.

Our converter handles the full range of concentration units from nanomolar (nM) to percentage solutions, making it easy to work with any concentration scale. Whether you're preparing a 1 M stock solution or measuring trace contaminants at ppt levels, this tool provides accurate conversions for all your laboratory needs.

🧪 Common Laboratory Concentrations

Stock Solutions:
  • • 1 M = 1000 mM = 1,000,000 µM
  • • 0.1 M = 100 mM = 100,000 µM
  • • 0.01 M = 10 mM = 10,000 µM
  • • 1 mM = 1000 µM = 1,000,000 nM
Working Solutions:
  • • 1 µM = 1000 nM = 1,000,000 pM
  • • 1 ppm = 1 mg/L ≈ 1 mM (for small molecules)
  • • 1% = 10 g/L = 10,000 mg/L
  • • 1 ppb = 1 µg/L = 1000 ng/L

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