How fast does sonic run in full speed

Sonic the Hedgehog, on average, is known to run faster than the speed of sound. Sonic could instantly accelerate faster than the speed of sound with ease as shown in sonic x episode 1. He could increase his speed by using his Super Peel-Out technique, as shown in Sonic the hedgehog cd, Sonic Chaos, Sonic Triple Trouble, and Sonic Blast.

• In sonic unleashed the checkpoints posts also act as radars that clock Sonic's speed when he passes them, which clocked his fastest speed of being able to go over 2,500 mph.
  
• In Sonic Adventure DX manual that ''He's the world's fastest, hypersonic hedgehog'' which is at a staggering speed of 3,840 mph.
• In Sonic Adventure, Sonic Adventure 2, Sonic Heroes and in Conic generations, Sonic can move at the speed of light, as seen by his specific light speed set of moves. Those moves include the light speed dash and light speed attack.