Here's how we calculate that:

* Speed of light: Light travels at approximately 299,792,458 meters per second (m/s).

* Distance from Sun to Mars: The average distance between the Sun and Mars is about 227.9 million kilometers (141.6 million miles).

* Time = Distance / Speed

Therefore:

* Time = (227,900,000,000 meters) / (299,792,458 m/s)

* Time ≈ 759.9 seconds

* Time ≈ 12.66 minutes

Since the distance between the Sun and Mars varies slightly depending on Mars' position in its orbit, the travel time can fluctuate slightly as well.