How fast is all might?

[goldentiger510]

That's actually the only information we have on All-Might's speed. That scene you're referring to occurred in Chapter 90, which tells us that All-Might ran 5 kilometers in just 30 seconds, giving him a speed of about 600km/hr.

[blackelephant230]

Speed/agility Using the 60x prime multiplyer, at prime all might would have been able to move at least 300km in 30 seconds, or 30km in 3 seconds, or 10 km per second. According to Wikipedia (I know, not the most reliable source) in a lightning strike, the leader travels at 61 km/s, and the return stroke at 27800km/s.

Secondly, is all might light speed? All Mights Current speed. So All Might took over 30 seconds to cross 5 kilometers.

how strong is all might?

By channeling this power through his body, Toshinori had superhuman strength, speed, agility as well as invulnerability. All Might was so proficient with One For All that he was widely known as the worlds most powerful person. So much so, that All Might can level half a city with a single punch.

Is DEKU faster than all might?

Will Deku from My Hero Academia ever surpass All Might? Yes, he will. Based on the way One For All works, each wielder masters the power, improves it to the point where they surpass the last wielder, then passes it on to someone else.