Convert parts per billion to grain per US gallon (as CaCO₃)
1 ppb = 0.00005841803949 gpg
1 ppb = 0.000058418 gpg
1 ppb in every concentration unit
| part per trillion | 1,000 ppt |
| nanogram per liter | 1,000 ng/L |
| parts per billion | 1 ppb |
| microgram per liter | 1 μg/L |
| parts per million | 0.001 ppm |
| part per million by volume | 0.001 ppmv |
| milligram per kilogram | 0.001 mg/kg |
| milligram per liter | 0.001 mg/L |
| grain per US gallon (as CaCO₃) | 0.000058418 gpg |
| part per thousand | 0.000001 ppth |
| gram per liter | 0.000001 g/L |
| percent | 1.0000e-07 % |
| percent by weight | 1.0000e-07 % w/w |
| percent by volume | 1.0000e-07 % v/v |
| percent weight per volume | 1.0000e-07 % w/v |
| fraction (0–1) | 1.0000e-09 fraction |
How the conversion works
Multiply by 0.00005841803949 to go from parts per billion to grain per US gallon (as CaCO₃), 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? grain per US gallon (as CaCO₃) to parts per billion — 1 gpg = 17,118 ppb.
parts per billion to grain per US gallon (as CaCO₃) — common values
| 1 ppb | 0.000058418039 gpg |
| 2 ppb | 0.00011683608 gpg |
| 3 ppb | 0.00017525412 gpg |
| 5 ppb | 0.0002920902 gpg |
| 10 ppb | 0.00058418039 gpg |
| 15 ppb | 0.00087627059 gpg |
| 20 ppb | 0.0011683608 gpg |
| 25 ppb | 0.001460451 gpg |
| 50 ppb | 0.002920902 gpg |
| 75 ppb | 0.004381353 gpg |
| 100 ppb | 0.0058418039 gpg |
| 250 ppb | 0.01460451 gpg |
| 500 ppb | 0.02920902 gpg |
| 1000 ppb | 0.058418039 gpg |