To convert concentration from parts per million (ppm) to parts per gallon (ppg), you’ll need to know the specific context, because “parts per gallon” isn’t universally defined. However, if we assume you’re talking about U.S. gallons, here’s a basic conversion:
1 U.S. gallon = 1,000,000 micro-gallons.
Thus, 1 ppm (part per million) is equivalent to 1 micro-gallon per U.S. gallon. This means that 1 ppm is equal to 1 ppg (part per U.S. gallon) when discussing concentration.
However, in some contexts, ppg is used to represent “pounds per gallon.” If you are referring to this context, you’d need the specific density or weight of the substance in question to accurately convert ppm of a substance to ppg (pounds per gallon).