Convert grain per US gallon (as CaCO₃) to parts per million
1 gpg = 17.118 ppm
1 gpg = 17.118 ppm
1 gpg in every concentration unit
| part per trillion | 17,118,000 ppt |
| nanogram per liter | 17,118,000 ng/L |
| parts per billion | 17,118 ppb |
| microgram per liter | 17,118 μg/L |
| parts per million | 17.118 ppm |
| part per million by volume | 17.118 ppmv |
| milligram per kilogram | 17.118 mg/kg |
| milligram per liter | 17.118 mg/L |
| grain per US gallon (as CaCO₃) | 1 gpg |
| part per thousand | 0.017118 ppth |
| gram per liter | 0.017118 g/L |
| percent | 0.0017118 % |
| percent by weight | 0.0017118 % w/w |
| percent by volume | 0.0017118 % v/v |
| percent weight per volume | 0.0017118 % w/v |
| fraction (0–1) | 0.000017118 fraction |
How the conversion works
Multiply by 17.118 to go from grain per US gallon (as CaCO₃) to parts per million, or divide by it to go back. Every conversion on this site routes through the SI value (%) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? parts per million to grain per US gallon (as CaCO₃) — 1 ppm = 0.05841803949 gpg.
grain per US gallon (as CaCO₃) to parts per million — common values
| 1 gpg | 17.118 ppm |
| 2 gpg | 34.236 ppm |
| 3 gpg | 51.354 ppm |
| 5 gpg | 85.59 ppm |
| 10 gpg | 171.18 ppm |
| 15 gpg | 256.77 ppm |
| 20 gpg | 342.36 ppm |
| 25 gpg | 427.95 ppm |
| 50 gpg | 855.9 ppm |
| 75 gpg | 1,283.85 ppm |
| 100 gpg | 1,711.8 ppm |
| 250 gpg | 4,279.5 ppm |
| 500 gpg | 8,559 ppm |
| 1000 gpg | 17,118 ppm |