Concentration Converter
Convert ppm, mg/L and percent
For dilute aqueous solutions, 1 ppm ≈ 1 mg/L
Quick Facts
- •1 ppm = 1 mg/L (for water)
- •1% = 10,000 ppm
- •EPA drinking water chlorine: 0.2-4 ppm
Understanding Concentration Units
Parts per million (ppm) and milligrams per liter (mg/L) are nearly identical for dilute aqueous solutions because water's density is approximately 1 g/mL. 1 ppm = 1 mg/L = 0.0001%. These units are used for water quality, environmental monitoring, and chemical analysis.
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This calculator is for educational and reference purposes only. Always verify critical calculations independently.