| How to use this calculator... 
 Use current calculator (page) to convert Concentration from Grain / gallon(UK) to Part per million (ppm). Simply enter Concentration quantity and click ‘Convert’. Both Grain / gallon(UK) and Part per million (ppm) are Concentration measurement units.For conversion to different Concentration units, select required units from the dropdown list (combo), enter quantity and click convertFor very large or very small quantity, enter number in scientific notation, Accepted format are 3.142E12 or 3.142E-12 or 3.142x10**12 or 3.142x10^12 or 3.142*10**12 or 3.142*10^12 and like wise
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