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Percent (%) to Parts per Million (ppm)

Convert percentage concentration to PPM for chemistry and water treatment.

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Formula: % × 10000 = ppm
How to use this converter
  1. 1Enter percentage.
  2. 2PPM appears instantly. 1% = 10,000 ppm.
Common questions
0.01% = 100 ppm.
CO₂ in fresh air: ~415 ppm. OSHA CO limit: 50 ppm. EPA lead in water: 15 ppb.
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