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 km = 1,093.613 yd
1 yd = 0.001 km
例子:
将15 公里转换为院子：
15 km = 16,404.199 yd
| 公里 | 院子 |
|---|---|
| 0.01 km | 10.936 yd |
| 0.1 km | 109.361 yd |
| 1 km | 1,093.613 yd |
| 2 km | 2,187.227 yd |
| 3 km | 3,280.84 yd |
| 5 km | 5,468.066 yd |
| 10 km | 10,936.133 yd |
| 20 km | 21,872.266 yd |
| 30 km | 32,808.399 yd |
| 40 km | 43,744.532 yd |
| 50 km | 54,680.665 yd |
| 60 km | 65,616.798 yd |
| 70 km | 76,552.931 yd |
| 80 km | 87,489.064 yd |
| 90 km | 98,425.197 yd |
| 100 km | 109,361.33 yd |
| 250 km | 273,403.325 yd |
| 500 km | 546,806.649 yd |
| 750 km | 820,209.974 yd |
| 1000 km | 1,093,613.298 yd |
| 10000 km | 10,936,132.983 yd |
| 100000 km | 109,361,329.834 yd |
规则