速度是对象移动的速度，而速度是指定方向的速度。它以每秒米（m/s）为单位进行测量。
1 pc/yr = 31,558,499.047 c
1 c = 3.1687e-8 pc/yr
例子:
将15 每年parsec转换为光速：
15 pc/yr = 473,377,485.7 c
| 每年parsec | 光速 |
|---|---|
| 0.01 pc/yr | 315,584.99 c |
| 0.1 pc/yr | 3,155,849.905 c |
| 1 pc/yr | 31,558,499.047 c |
| 2 pc/yr | 63,116,998.093 c |
| 3 pc/yr | 94,675,497.14 c |
| 5 pc/yr | 157,792,495.233 c |
| 10 pc/yr | 315,584,990.467 c |
| 20 pc/yr | 631,169,980.934 c |
| 30 pc/yr | 946,754,971.401 c |
| 40 pc/yr | 1,262,339,961.868 c |
| 50 pc/yr | 1,577,924,952.335 c |
| 60 pc/yr | 1,893,509,942.802 c |
| 70 pc/yr | 2,209,094,933.269 c |
| 80 pc/yr | 2,524,679,923.736 c |
| 90 pc/yr | 2,840,264,914.203 c |
| 100 pc/yr | 3,155,849,904.67 c |
| 250 pc/yr | 7,889,624,761.674 c |
| 500 pc/yr | 15,779,249,523.349 c |
| 750 pc/yr | 23,668,874,285.023 c |
| 1000 pc/yr | 31,558,499,046.697 c |
| 10000 pc/yr | 315,584,990,466.972 c |
| 100000 pc/yr | 3,155,849,904,669.717 c |
规则