3 ms·Are you sure it's km/s? :Dby mcdevilkiller 7y agoAre you sure it's km/s? :Dtromp 7y agoAs https://en.wikipedia.org/wiki/Speed_of_light https://en.wikipedia.org/wiki/Speed_of_light puts it: "Its exact value is 299,792,458 metres per second (approximately 300,000 km/s"phaemon 7y agoYes, it is.