User blog comment:Windindi/Sonic The Hedgehog Math/@comment-26387943-20150623205514

If super sonic's top speed is 5,000,000 kph, that means he's going 3,106,900 mph. The speed of light is 670,616,629 mph. This means Super Sonic is nowhere near lightspeed. However, with the 2000x increase from Hyper Sonic, his top speed is now 6,213,800,000 mph which is about 9.5x the speed of light. Your final calculation is wrong.