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 pc = 33,748,906,386,701,664 yd
1 yd = 2.9631e-17 pc
例子:
将15 parsec转换为院子：
15 pc = 506,233,595,800,524,900 yd
| parsec | 院子 |
|---|---|
| 0.01 pc | 337,489,063,867,016.6 yd |
| 0.1 pc | 3,374,890,638,670,166.5 yd |
| 1 pc | 33,748,906,386,701,664 yd |
| 2 pc | 67,497,812,773,403,330 yd |
| 3 pc | 101,246,719,160,105,000 yd |
| 5 pc | 168,744,531,933,508,320 yd |
| 10 pc | 337,489,063,867,016,640 yd |
| 20 pc | 674,978,127,734,033,300 yd |
| 30 pc | 1,012,467,191,601,049,900 yd |
| 40 pc | 1,349,956,255,468,066,600 yd |
| 50 pc | 1,687,445,319,335,083,300 yd |
| 60 pc | 2,024,934,383,202,099,700 yd |
| 70 pc | 2,362,423,447,069,116,400 yd |
| 80 pc | 2,699,912,510,936,133,000 yd |
| 90 pc | 3,037,401,574,803,150,000 yd |
| 100 pc | 3,374,890,638,670,166,500 yd |
| 250 pc | 8,437,226,596,675,416,000 yd |
| 500 pc | 16,874,453,193,350,832,000 yd |
| 750 pc | 25,311,679,790,026,250,000 yd |
| 1000 pc | 33,748,906,386,701,664,000 yd |
| 10000 pc | 337,489,063,867,016,600,000 yd |
| 100000 pc | 3,374,890,638,670,166,500,000 yd |
规则