Milligram per Liter (mg/L)
Milligram per liter equals 10⁻⁶ kg/L — used for trace concentrations in water and environmental monitoring.
Milligrams per liter report drinking-water contaminants, dissolved metals, and low-level chemical concentrations.
Milligram per Liter to Part per Million (ppm)
Convert milligram per liter to part per million (ppm) instantly. Type in either field — results update live.
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Concentration-Solution Milligram per Liter Part per Million (ppm)
1 milligram per liter = 1 part per million (ppm)
Unit
Unit
Conversion table
Selected mg/L values converted to ppm using the exact factor from this tool.
| mg/L | ppm |
|---|---|
| 0.01 | 0.01 |
| 0.1 | 0.1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 5 | 5 |
| 10 | 10 |
| 20 | 20 |
| 50 | 50 |
| 100 | 100 |
| 1,000 | 1,000 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 mg/L = 1 ppm
1 ppm = 1 mg/L
To convert milligram per liter to part per million (ppm), multiply by 1.
To convert part per million (ppm) to milligram per liter, multiply by 1.
Example: convert 10 mg/L to ppm
10 × 1 = 10 ppm
About these units
Short background on the units used in this conversion.
Part per Million (ppm) (ppm)
Part per million (ppm) equals 10⁻⁶ kg/L by mass fraction. For dilute aqueous solutions with density approximately 1 kg/L, ppm equals mg/L.
Parts per million express trace contaminants in water, air, and food. The ppm = mg/L equivalence assumes near-unit density of the solvent.
Frequently asked questions
How many parts per million are in one milligram per liter?
One milligram per liter equals 1 parts per million. Multiply your milligrams per liter value by 1 to convert to parts per million.
What is the conversion formula?
ppm = mg/L × 1The reverse is
mg/L = ppm × 1, using the same exact factors as this converter.Is this Milligram per Liter to Part per Million (ppm) converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All milligram per liter conversions
Jump to any concentration-solution conversion starting from milligram per liter — including the reverse direction and every other unit in our dataset.
part per million (ppm) (ppm) → milligram per liter (mg/L)
milligram per liter (mg/L) → kilogram per liter (kg/L)milligram per liter (mg/L) → gram per liter (g/L)milligram per liter (mg/L) → grain per gallon (us) (gr/gal (US))milligram per liter (mg/L) → grain per gallon (uk) (gr/gal (UK))milligram per liter (mg/L) → pound per gallon (us) (lb/gal (US))milligram per liter (mg/L) → pound per gallon (uk) (lb/gal (UK))milligram per liter (mg/L) → pound per million gallon (us) (lb/Mgal (US))milligram per liter (mg/L) → pound per million gallon (uk) (lb/Mgal (UK))milligram per liter (mg/L) → pound per cubic foot (lb/ft³)