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 %mass = 10,000 ppm
1 ppm = 1.0000e-4 %mass
例子:
将15 质量百分比转换为零件百万：
15 %mass = 150,000 ppm
| 质量百分比 | 零件百万 |
|---|---|
| 0.01 %mass | 100 ppm |
| 0.1 %mass | 1,000 ppm |
| 1 %mass | 10,000 ppm |
| 2 %mass | 20,000 ppm |
| 3 %mass | 30,000 ppm |
| 5 %mass | 50,000 ppm |
| 10 %mass | 100,000 ppm |
| 20 %mass | 200,000 ppm |
| 30 %mass | 300,000 ppm |
| 40 %mass | 400,000 ppm |
| 50 %mass | 500,000 ppm |
| 60 %mass | 600,000 ppm |
| 70 %mass | 700,000 ppm |
| 80 %mass | 800,000 ppm |
| 90 %mass | 900,000 ppm |
| 100 %mass | 1,000,000 ppm |
| 250 %mass | 2,500,000 ppm |
| 500 %mass | 5,000,000 ppm |
| 750 %mass | 7,500,000 ppm |
| 1000 %mass | 10,000,000 ppm |
| 10000 %mass | 100,000,000 ppm |
| 100000 %mass | 1,000,000,000 ppm |
规则