How fast is the speed of light?
1,079.25 million km/hAbout 671 million mph · Cosmic
Exactly 299,792.458 km a second. Nothing travels faster.
That's about 19,000,000 times a red kangaroo's top speed (56 km/h).
💡1,079.25 million km/h
💥a supernova
By speed: light is about 30× faster than a supernova.
Things about as fast
- How fast is the solar wind?1.44 million km/h
- How fast is the Milky Way moving?2 million km/h
- What is the Sun's escape velocity?2.22372 million km/h
- How fast is supernova debris?36 million km/h
- How fast is a lightning strike?360 million km/h
- How fast does light travel in a diamond?446.5 million km/h
- How fast does internet data travel in fibre?720 million km/h
- How fast does light travel in water?811 million km/h
Many real things vary, so we use a typical or official figure. Spotted a mistake? Email [email protected].