浓度（摩尔）是每升溶液的摩尔数量的度量，通常以每升摩尔（mol/l）测量。
1 ppb = 0.001 ppm
1 ppm = 1,000 ppb
例子:
将15 零件十亿转换为零件百万：
15 ppb = 0.015 ppm
| 零件十亿 | 零件百万 |
|---|---|
| 0.01 ppb | 1.0000e-5 ppm |
| 0.1 ppb | 0 ppm |
| 1 ppb | 0.001 ppm |
| 2 ppb | 0.002 ppm |
| 3 ppb | 0.003 ppm |
| 5 ppb | 0.005 ppm |
| 10 ppb | 0.01 ppm |
| 20 ppb | 0.02 ppm |
| 30 ppb | 0.03 ppm |
| 40 ppb | 0.04 ppm |
| 50 ppb | 0.05 ppm |
| 60 ppb | 0.06 ppm |
| 70 ppb | 0.07 ppm |
| 80 ppb | 0.08 ppm |
| 90 ppb | 0.09 ppm |
| 100 ppb | 0.1 ppm |
| 250 ppb | 0.25 ppm |
| 500 ppb | 0.5 ppm |
| 750 ppb | 0.75 ppm |
| 1000 ppb | 1 ppm |
| 10000 ppb | 10 ppm |
| 100000 ppb | 100 ppm |
规则