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 cm = 3.2404e-19 pc
1 pc = 3,086,000,000,000,000,000 cm
例子:
将15 厘米转换为parsec：
15 cm = 4.8607e-18 pc
| 厘米 | parsec |
|---|---|
| 0.01 cm | 3.2404e-21 pc |
| 0.1 cm | 3.2404e-20 pc |
| 1 cm | 3.2404e-19 pc |
| 2 cm | 6.4809e-19 pc |
| 3 cm | 9.7213e-19 pc |
| 5 cm | 1.6202e-18 pc |
| 10 cm | 3.2404e-18 pc |
| 20 cm | 6.4809e-18 pc |
| 30 cm | 9.7213e-18 pc |
| 40 cm | 1.2962e-17 pc |
| 50 cm | 1.6202e-17 pc |
| 60 cm | 1.9443e-17 pc |
| 70 cm | 2.2683e-17 pc |
| 80 cm | 2.5924e-17 pc |
| 90 cm | 2.9164e-17 pc |
| 100 cm | 3.2404e-17 pc |
| 250 cm | 8.1011e-17 pc |
| 500 cm | 1.6202e-16 pc |
| 750 cm | 2.4303e-16 pc |
| 1000 cm | 3.2404e-16 pc |
| 10000 cm | 3.2404e-15 pc |
| 100000 cm | 3.2404e-14 pc |
规则