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 lb = 0.071 st
1 st = 14 lb
例子:
将15 磅转换为石头：
15 lb = 1.071 st
| 磅 | 石头 |
|---|---|
| 0.01 lb | 0.001 st |
| 0.1 lb | 0.007 st |
| 1 lb | 0.071 st |
| 2 lb | 0.143 st |
| 3 lb | 0.214 st |
| 5 lb | 0.357 st |
| 10 lb | 0.714 st |
| 20 lb | 1.429 st |
| 30 lb | 2.143 st |
| 40 lb | 2.857 st |
| 50 lb | 3.571 st |
| 60 lb | 4.286 st |
| 70 lb | 5 st |
| 80 lb | 5.714 st |
| 90 lb | 6.429 st |
| 100 lb | 7.143 st |
| 250 lb | 17.857 st |
| 500 lb | 35.714 st |
| 750 lb | 53.571 st |
| 1000 lb | 71.429 st |
| 10000 lb | 714.286 st |
| 100000 lb | 7,142.861 st |
规则