Solution Concentration Converter

Convert ppm to g/L, mg/L, and % solution—free and instant. 1 ppm = 1 mg/L in dilute aqueous solutions. For chemistry labs and environmental testing.

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Common Conversions
Quick access to frequently used conversions
Unit Information

percentage

Unit measurements

%
percentage
Percentage
Base unit of solution concentration
% (w/w)
percentage
Percentage Weight/Weight
Percentage by weight/weight
% (v/v)
percentage
Percentage Volume/Volume
Percentage by volume/volume
% (w/v)
percentage
Percentage Weight/Volume
Percentage by weight/volume

parts_per

Unit measurements

ppm
parts_per
Parts Per Million
Parts per million (1 in 1,000,000)
ppb
parts_per
Parts Per Billion
Parts per billion (1 in 1,000,000,000)
ppt
parts_per
Parts Per Trillion
Parts per trillion (1 in 1,000,000,000,000)
ppq
parts_per
Parts Per Quadrillion
Parts per quadrillion (1 in 1,000,000,000,000,000)

mass_per_volume

Unit measurements

mg/L
mass_per_volume
Milligram per Liter
Milligram per liter (for dilute aqueous solutions ≈ ppm)
g/L
mass_per_volume
Gram per Liter
Gram per liter
μg/L
mass_per_volume
Microgram per Liter
Microgram per liter (≈ ppb for dilute solutions)
ng/L
mass_per_volume
Nanogram per Liter
Nanogram per liter (≈ ppt for dilute solutions)

Practical Units

Commonly used units in practical applications

g/kg
practical
Gram per Kilogram
Gram per kilogram (same as % for dilute solutions)
mg/kg
practical
Milligram per Kilogram
Milligram per kilogram (≈ ppm)
μg/kg
practical
Microgram per Kilogram
Microgram per kilogram (≈ ppb)
mol/L
practical
Mole per Liter
Molar concentration (molarity)
Preferences

Solution concentration quick reference

ConversionResult
1 ppm1 mg/L
1000 ppm1 g/L
1%10 g/L

Solution Concentration Converter

Convert ppm to g/L, mg/L, and percent solution for chemistry labs and environmental testing. For dilute aqueous solutions, 1 ppm equals 1 mg/L. For mass fraction and ppb conversions, see our Concentration Converter; for molarity use the Molarity Converter.

Common solution conversions

  • 1 ppm ≈ 1 mg/L (dilute aqueous)
  • 1000 ppm = 1 g/L
  • 1% = 10 g/L = 10,000 ppm
  • 1 ppm = 1000 ppb

Frequently asked questions

How do I convert ppm to g/L?

For dilute aqueous solutions, 1 ppm ≈ 1 mg/L and 1000 ppm = 1 g/L. Enter ppm as source and g/L as target in this solution concentration converter.

Is 1 ppm equal to 1 mg/L?

Yes for dilute water-based solutions at low concentrations. This tool converts ppm, mg/L, g/L, and percent solution units instantly.

How is this different from the concentration converter?

This page focuses on solution concentration (ppm, g/L, % w/v, mg/L). For mass fraction and ppb to mg/L see the Concentration Converter; for mol/L use the Molarity Converter.

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Added Nov 30, 2025

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