Parts per million,
calculated instantly.
Fast, accurate PPM tools for water testing, chemistry, hydroponics, air quality, aquariums, and lab analysis. No login needed.
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What is PPM?
PPM stands for parts per million. It is a unit of concentration describing how many parts of a substance exist in one million parts of a total solution or mixture. In water-based solutions, 1 PPM equals 1 mg/L — one milligram of substance per liter of water.
PPM is used across water quality testing, chemistry, environmental monitoring, hydroponics, food safety, and industrial quality control to measure very small concentrations with precision.
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Standard scientific formulas used across all tools. Results match laboratory methods.
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