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 yd = 2.9631e-17 pc
1 pc = 33,748,906,386,701,664 yd
例子:
将15 院子转换为parsec：
15 yd = 4.4446e-16 pc
| 院子 | parsec |
|---|---|
| 0.01 yd | 2.9631e-19 pc |
| 0.1 yd | 2.9631e-18 pc |
| 1 yd | 2.9631e-17 pc |
| 2 yd | 5.9261e-17 pc |
| 3 yd | 8.8892e-17 pc |
| 5 yd | 1.4815e-16 pc |
| 10 yd | 2.9631e-16 pc |
| 20 yd | 5.9261e-16 pc |
| 30 yd | 8.8892e-16 pc |
| 40 yd | 1.1852e-15 pc |
| 50 yd | 1.4815e-15 pc |
| 60 yd | 1.7778e-15 pc |
| 70 yd | 2.0741e-15 pc |
| 80 yd | 2.3704e-15 pc |
| 90 yd | 2.6668e-15 pc |
| 100 yd | 2.9631e-15 pc |
| 250 yd | 7.4076e-15 pc |
| 500 yd | 1.4815e-14 pc |
| 750 yd | 2.2223e-14 pc |
| 1000 yd | 2.9631e-14 pc |
| 10000 yd | 2.9631e-13 pc |
| 100000 yd | 2.9631e-12 pc |
规则