质量是物理中物质的数量。它是物质的基本特性，以千克（kg）进行测量。
1 st = 0.006 mt
1 mt = 157.473 st
例子:
将15 石头转换为公吨：
15 st = 0.095 mt
| 石头 | 公吨 |
|---|---|
| 0.01 st | 6.3503e-5 mt |
| 0.1 st | 0.001 mt |
| 1 st | 0.006 mt |
| 2 st | 0.013 mt |
| 3 st | 0.019 mt |
| 5 st | 0.032 mt |
| 10 st | 0.064 mt |
| 20 st | 0.127 mt |
| 30 st | 0.191 mt |
| 40 st | 0.254 mt |
| 50 st | 0.318 mt |
| 60 st | 0.381 mt |
| 70 st | 0.445 mt |
| 80 st | 0.508 mt |
| 90 st | 0.572 mt |
| 100 st | 0.635 mt |
| 250 st | 1.588 mt |
| 500 st | 3.175 mt |
| 750 st | 4.763 mt |
| 1000 st | 6.35 mt |
| 10000 st | 63.503 mt |
| 100000 st | 635.029 mt |
规则