While it is never stated, that I can recall, Clark is said to move so fast that the street cameras can't see him and even a full stop at his relative speed is still appears that everything is frozen in time.

Can we estimate how fast his movement speed is using this?

  • You can check this answer. It explains you that, according to Eistein's relativity law, an object seems frozen to you if you're moving at the speed of light.
    – Saphirel
    Oct 18, 2016 at 12:39
  • Are we talking video camera or single image camera? It will depend on shutter speed or frames per second and the distance covered.
    – Paulie_D
    Oct 18, 2016 at 13:24
  • Closed circuit cameras I think I would assume slighlty better than the standard street security camera in the mid-2000s. They're referenced, but a direct shot can be seen when Clark is caught on camera by Jimmy who is using a professional Camera in Season 8 ep 7 "Identity". That's probably the best to work with. Also as far as we are shown Clark seems to never Sonic Boom which implies he never reaches mach1, at least on camera. We are also given a semi-good distance of Big Ben to Metropolis in like a minute in a s10 ep, but DC Earth is usually considered bigger so not distance measure.
    – Durakken
    Oct 18, 2016 at 13:34
  • 1
    I believe it’s slightly slower than Smallville Flash. Jan 24, 2017 at 18:13

2 Answers 2


It shouldn't be surprising that a teen show about Superman is inconsistent in its presentation of physics and the exact magnitude of the hero's power.

There are times when Clark does things that arguably require him to move faster than light, such as running through a fight and grabbing bullets without anyone seeing him or outrunning a camera, and other times where he moves at more mundane speeds.

This is further muddled by the lack of sonic booms or atomic explosions, which would contradict the speed he shows if you're worried about real physics.

So, somewhere between super fast and faster than light, depending on the story requirements.

Here's a mathematical breakdown of his speed moving across a bridge in a particular episode. They calculated his speed at at 296 mph, so consider that a lower bound.


ok so he apparently holds back his speed as he said in season 8, but when he didn't he moved 7 times the distance a camera flash did and looked back and then ran off and the light caught him, this makes him 10 times faster than light and in season 10 he moved hundreds of meters to move a girl before she took a photo of lois, he moved her after she pressed the button and when he brought her atleast several buildings away the photo didn't take the pick of lois and instead took a photo of coffee meaning he took he her hundreds of meters after she took the photo and bought her a coffee

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