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Concentration — Solution Converter

Convert solution concentrations: g/L, mg/L, kg/L.

5 units
6 decimals

1 kg/L = 1000 g/L

About the concentration — solution converter

Convert mass-based solution concentration between kg/L, g/L, mg/L, ppm, and lb/gal (US). Mass concentration measures grams of solute per liter (or other volume) of solution — useful when molecular weight is unknown or when working with mixed substances.

Frequently asked questions

  • Is mg/L the same as ppm?

    For dilute aqueous solutions, yes — the densities are close enough to 1 g/mL that mg/L ≈ ppm by mass.

  • How many g/L is 1 lb/gal (US)?

    One pound per US gallon equals approximately 119.83 g/L.

  • When should I use mass concentration vs molar concentration?

    Mass concentration when the solute’s molecular weight is unknown or mixed; molar concentration when reactions or stoichiometry matter.

More fluids converters

Flow → Flow — Mass → Flow — Molar → Mass Flux Density → Concentration — Molar → Viscosity — Dynamic → Viscosity — Kinematic → Surface Tension →

Complete list of concentration — solution units