PPM to mg/L Converter
Convert between parts per million (PPM) and milligrams per liter (mg/L) with density consideration
PPM ⇄ mg/L Converter
Parts of solute per million parts of solution
Mass concentration in milligrams per liter
Density of the dissolved substance (default: 1000 kg/m³ for water)
Quick Presets:
Conversion Results
Conversion Formula
Special case: For water-like density (~1000 kg/m³), 1 PPM ≈ 1 mg/L
Optional: Molar Concentration
Common Conversion Examples
| Substance | Density (kg/m³) | 100 PPM in mg/L | 1000 mg/L in PPM |
|---|---|---|---|
| Water (pure) | 1,000 | 100 mg/L | 1,000 PPM |
| Seawater | 1,025 | 102.5 mg/L | 976 PPM |
| Ethanol | 789 | 78.9 mg/L | 1,267 PPM |
| Oil (typical) | 920 | 92 mg/L | 1,087 PPM |
| Gasoline | 750 | 75 mg/L | 1,333 PPM |
Key Concepts
PPM (Parts per Million)
Number of solute particles per million solution particles
mg/L (Milligrams per Liter)
Mass concentration - milligrams of solute per liter of solution
Density Dependency
Conversion depends on solute density in kg/m³
Water Special Case
For water-like density: 1 PPM ≈ 1 mg/L
Common Applications
Understanding PPM to mg/L Conversion
What's the Difference?
PPM and mg/L measure concentration differently. PPM counts particle ratios, while mg/L measures mass concentration. The relationship depends on the substance's density.
Why Density Matters
- •Dense substances (like oil) have smaller volumes per mass
- •Light substances (like alcohol) have larger volumes per mass
- •Different densities give different PPM values for same mg/L
Conversion Formulas
Note: Density must be in kg/m³ for these formulas to work correctly.
Example Calculation
Converting 1,230 PPM of oil (density = 920 kg/m³) to mg/L: