长度是一个基本的物理量，可测量两个点之间的距离。它是国际单元（SI）中的七个基本单元之一，仪表（m）是其基本单元。
1 ch = 20,116,800,000 nm
1 nm = 4.9710e-11 ch
例子:
将15 链转换为纳米：
15 ch = 301,752,000,000 nm
| 链 | 纳米 |
|---|---|
| 0.01 ch | 201,168,000 nm |
| 0.1 ch | 2,011,680,000 nm |
| 1 ch | 20,116,800,000 nm |
| 2 ch | 40,233,600,000 nm |
| 3 ch | 60,350,400,000 nm |
| 5 ch | 100,584,000,000 nm |
| 10 ch | 201,168,000,000 nm |
| 20 ch | 402,336,000,000 nm |
| 30 ch | 603,504,000,000 nm |
| 40 ch | 804,672,000,000 nm |
| 50 ch | 1,005,840,000,000 nm |
| 60 ch | 1,207,008,000,000 nm |
| 70 ch | 1,408,176,000,000 nm |
| 80 ch | 1,609,344,000,000 nm |
| 90 ch | 1,810,512,000,000 nm |
| 100 ch | 2,011,680,000,000 nm |
| 250 ch | 5,029,200,000,000 nm |
| 500 ch | 10,058,400,000,000 nm |
| 750 ch | 15,087,600,000,000 nm |
| 1000 ch | 20,116,800,000,000 nm |
| 10000 ch | 201,168,000,000,000 nm |
| 100000 ch | 2,011,680,000,000,000 nm |
规则