Convert grain per US gallon (as CaCO₃) to parts per million

1 gpg = 17.118 ppm

1 gpg = 17.1 ppm
1 gpg in every concentration unit
percent0.00171 %
fraction (0–1)0.0000171 fraction
parts per million17.1 ppm
parts per billion17,100 ppb
grain per US gallon (as CaCO₃)1 gpg
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 gpg17.118 ppm
2 gpg34.236 ppm
3 gpg51.354 ppm
5 gpg85.59 ppm
10 gpg171.18 ppm
15 gpg256.77 ppm
20 gpg342.36 ppm
25 gpg427.95 ppm
50 gpg855.9 ppm
75 gpg1,283.85 ppm
100 gpg1,711.8 ppm
250 gpg4,279.5 ppm
500 gpg8,559 ppm
1000 gpg17,118 ppm