ppm in ppb sta opredeljeni kot:
1 ppm = 1/10 6 = 10 -6
1ppb = 1/10 9 = 10 -9
Torej
1ppm = 1000ppb
Število delov na milijardo x ppb je enako številu delov na milijon x ppm, pomnoženo s 1000:
x ppb = x ppm ⋅ 1000
Primer: 7ppm je enako 7000ppb:
x ppb = 7ppm ⋅ 1000 = 7000ppb
| ppm | ppb |
|---|---|
| 0,001 | 1 |
| 0,01 | 10 |
| 0,1 | 100 |
| 1 | 1000 |
| 10 | 10000 |
| 100 | 100000 |
| 1000 | 1000000 |
| 10000 | 10000000 |