The speed of light is a universal physical constant that is exactly equal to 299,792,458 meters per second. To convert this to kilometers per hour, we can use the following conversion factors:

• 1 meter = 0.001 kilometers
• 1 second = 1/3600 hour

Using these conversion factors, we can calculate the speed of light in kilometers per hour as follows:

$$\begin{aligned} \text{Speed of light in km/h} &= \frac{\text{Speed of light in m/s} \times 3600}{1000} \ &= \frac{299,792,458 \times 3600}{1000} \ &= 1,079,252,848.8 \text{ km/h} \end{aligned}$$

Therefore, the speed of light in kilometers per hour is approximately 1,079,252,848.8 km/h.