Concentration Converter (ppm, %, mg/L)
Convert concentration between percent, ppm, ppb, mg/L, µg/L and g/L, free online.
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For dilute water-based solutions (density ≈ 1 g/mL), 1 ppm = 1 mg/L = 1 mg/kg, 1 ppb = 1 µg/L and 1% = 10,000 ppm. The conversion assumes this water-like density, so it is not exact for strong or non-aqueous solutions.