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 ct = 0.129 dwt
1 dwt = 7.776 ct
例子:
将15 克拉转换为轻量级：
15 ct = 1.929 dwt
| 克拉 | 轻量级 |
|---|---|
| 0.01 ct | 0.001 dwt |
| 0.1 ct | 0.013 dwt |
| 1 ct | 0.129 dwt |
| 2 ct | 0.257 dwt |
| 3 ct | 0.386 dwt |
| 5 ct | 0.643 dwt |
| 10 ct | 1.286 dwt |
| 20 ct | 2.572 dwt |
| 30 ct | 3.858 dwt |
| 40 ct | 5.144 dwt |
| 50 ct | 6.43 dwt |
| 60 ct | 7.716 dwt |
| 70 ct | 9.002 dwt |
| 80 ct | 10.288 dwt |
| 90 ct | 11.574 dwt |
| 100 ct | 12.86 dwt |
| 250 ct | 32.151 dwt |
| 500 ct | 64.301 dwt |
| 750 ct | 96.452 dwt |
| 1000 ct | 128.603 dwt |
| 10000 ct | 1,286.03 dwt |
| 100000 ct | 12,860.299 dwt |
规则