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 ppm = 1.0000e-4 %wt
1 %wt = 10,000 ppm
例子:
将15 零件百万转换为Weight Percent：
15 ppm = 0.001 %wt
| 零件百万 | Weight Percent |
|---|---|
| 0.01 ppm | 1.0000e-6 %wt |
| 0.1 ppm | 1.0000e-5 %wt |
| 1 ppm | 1.0000e-4 %wt |
| 2 ppm | 0 %wt |
| 3 ppm | 0 %wt |
| 5 ppm | 0.001 %wt |
| 10 ppm | 0.001 %wt |
| 20 ppm | 0.002 %wt |
| 30 ppm | 0.003 %wt |
| 40 ppm | 0.004 %wt |
| 50 ppm | 0.005 %wt |
| 60 ppm | 0.006 %wt |
| 70 ppm | 0.007 %wt |
| 80 ppm | 0.008 %wt |
| 90 ppm | 0.009 %wt |
| 100 ppm | 0.01 %wt |
| 250 ppm | 0.025 %wt |
| 500 ppm | 0.05 %wt |
| 750 ppm | 0.075 %wt |
| 1000 ppm | 0.1 %wt |
| 10000 ppm | 1 %wt |
| 100000 ppm | 10 %wt |
规则