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 c = 874,030.49 M/s
1 M/s = 1.1441e-6 c
例子:
将15 光速转换为声音速度：
15 c = 13,110,457.347 M/s
| 光速 | 声音速度 |
|---|---|
| 0.01 c | 8,740.305 M/s |
| 0.1 c | 87,403.049 M/s |
| 1 c | 874,030.49 M/s |
| 2 c | 1,748,060.98 M/s |
| 3 c | 2,622,091.469 M/s |
| 5 c | 4,370,152.449 M/s |
| 10 c | 8,740,304.898 M/s |
| 20 c | 17,480,609.796 M/s |
| 30 c | 26,220,914.694 M/s |
| 40 c | 34,961,219.592 M/s |
| 50 c | 43,701,524.49 M/s |
| 60 c | 52,441,829.388 M/s |
| 70 c | 61,182,134.286 M/s |
| 80 c | 69,922,439.184 M/s |
| 90 c | 78,662,744.082 M/s |
| 100 c | 87,403,048.98 M/s |
| 250 c | 218,507,622.449 M/s |
| 500 c | 437,015,244.898 M/s |
| 750 c | 655,522,867.347 M/s |
| 1000 c | 874,030,489.796 M/s |
| 10000 c | 8,740,304,897.959 M/s |
| 100000 c | 87,403,048,979.592 M/s |
规则