🧪 Concentration Converter

Convert between concentration units including mass fraction, mole fraction, volume fraction, ppm, ppb, and more. Essential for chemistry labs, environmental testing, and pharmaceuticals.

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Common Conversions
Quick access to frequently used conversions
Unit Information

Scientific Units

Scientific and technical measurements

fraction
scientific
Fraction
Unit fraction (0 to 1)
%
scientific
Percent
Percentage (0 to 100%)
ppm
scientific
Parts Per Million
Parts per million (1 ppm = 0.0001%)
ppb
scientific
Parts Per Billion
Parts per billion (1 ppb = 0.000001 ppm)
ppt
scientific
Parts Per Trillion
Parts per trillion (1 ppt = 0.000001 ppb)
mol/L
scientific
Moles per Liter
Molar concentration in moles per liter
mmol/L
scientific
Millimoles per Liter
Molar concentration in millimoles per liter
μmol/L
scientific
Micromoles per Liter
Molar concentration in micromoles per liter
nmol/L
scientific
Nanomoles per Liter
Molar concentration in nanomoles per liter

Metric Units

International System of Units (SI) measurements

g/L
metric
Grams per Liter
Mass concentration in grams per liter
mg/L
metric
Milligrams per Liter
Mass concentration in milligrams per liter
μg/L
metric
Micrograms per Liter
Mass concentration in micrograms per liter
ng/L
metric
Nanograms per Liter
Mass concentration in nanograms per liter
g/mL
metric
Grams per Milliliter
Weight per volume in grams per milliliter
mg/mL
metric
Milligrams per Milliliter
Weight per volume in milligrams per milliliter
μg/mL
metric
Micrograms per Milliliter
Weight per volume in micrograms per milliliter
g/kg
metric
Grams per Kilogram
Weight per weight in grams per kilogram
mg/kg
metric
Milligrams per Kilogram
Weight per weight in milligrams per kilogram
Preferences

Common Concentration Conversions

Chemistry Labs

Convert between molarity, mass concentration, and percentage solutions for chemical reactions and analysis.

Environmental Testing

Convert between ppm, ppb, and other concentration units for water quality, air pollution, and soil analysis.

Pharmaceuticals

Convert drug concentrations between different units for dosage calculations and formulation.

Concentration Unit Categories

Fraction Units

Unit fractions, percentages, and parts per million/billion/trillion for precise concentration measurements.

  • • Fractions (0 to 1)
  • • Percentages (0 to 100%)
  • • PPM, PPB, PPT

Mass Concentration

Mass per volume concentration units for solid and liquid solutions.

  • • g/L, mg/L
  • • μg/L, ng/L
  • • Mass per volume

Molar Concentration

Moles per volume concentration units for chemical calculations.

  • • mol/L, mmol/L
  • • μmol/L, nmol/L
  • • Molarity units

Weight per Volume

Weight per volume concentration units for dense solutions.

  • • g/mL, mg/mL
  • • μg/mL
  • • Density-based

Weight per Weight

Weight per weight concentration units for solid mixtures.

  • • g/kg, mg/kg
  • • Weight ratios
  • • Solid mixtures

Technical Information

Fraction Conversions

Our concentration converter uses unit fractions (0 to 1) as the base unit for all fraction-based conversions, ensuring accurate relationships between percentages, ppm, ppb, and ppt.

Key Relationships:

  • • 1% = 0.01 fraction = 10,000 ppm
  • • 1 ppm = 0.000001 fraction = 0.0001%
  • • 1 ppb = 0.000000001 fraction = 0.000001 ppm
  • • 1 ppt = 0.000000000001 fraction = 0.000001 ppb

Concentration Calculations

Mass and molar concentrations are converted using standard relationships and molecular weights for accurate chemical calculations.

Conversion Factors:

  • • 1 g/L = 1,000 mg/L = 1,000,000 μg/L
  • • 1 mol/L = 1,000 mmol/L = 1,000,000 μmol/L
  • • 1 g/mL = 1,000 mg/mL = 1,000,000 μg/mL
  • • 1 g/kg = 1,000 mg/kg = 1,000,000 μg/kg

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