To get Yhwach's actual speed we need the distance between the Soul King Dimension and Soul Society.

* 14,652,000,000 meters < Distance Ichigo travel in 9 hours and 15 minutes

How do I know this? Simple.

* 440,000 m/s x 33300 seconds = 14,652,000 km or 14,652,000,000 meters

Now where did I get 440,000 m/s from? Ichigo's speed. From various feats.

Ichigo reacted to Tenjiro who holds the title of lightning speed Tenjiro.

http://mangaseeonline.us/read-online/Bleach-chapter-520-page-11.html

http://mangaseeonline.us/read-online/Bleach-chapter-520-page-12.html

He also reacted point blank to lightning.

http://mangaseeonline.us/read-online/Bleach-chapter-582-page-2.html

http://mangaseeonline.us/read-online/Bleach-chapter-582-page-3.html

5 Gigajoules to be exact.

http://mangaseeonline.us/read-online/Bleach-chapter-582-page-11.html

Which she products from the clouds.

http://mangaseeonline.us/read-online/Bleach-chapter-580-page-3.html

http://mangaseeonline.us/read-online/Bleach-chapter-580-page-4.html

http://mangaseeonline.us/read-online/Bleach-chapter-581-page-15.html

Now where did I get 9 hours and 15 minutes from? From the Clock Tower in Seireitei, and Ichibei's statement.

The Quincy take over Seireitei began at 5 pm the first day.

http://mangaseeonline.us/read-online/Bleach-chapter-546-page-11.html

Ichigo went down after 3 hours at 8 pm

http://mangaseeonline.us/read-online/Bleach-chapter-555-page-7.html

Ichigo arrived at 5:15 pm the next day.

http://mangaseeonline.us/read-online/Bleach-chapter-581-page-21.html

That's 9 hours and 15 minutes or 33,300 seconds.

Soul Society and the Soul King Dimension are seperated by 14,652,000,000 meters.

Now how is this gonna help us to get Yhwach's speed? Simple.

Here Yhwach catches Mimihagi from point blank.

http://mangaseeonline.us/read-online/Bleach-chapter-620-page-14.html

He then absorbs it.

http://mangaseeonline.us/read-online/Bleach-chapter-620-page-15.html

He is as fast as Mimihagi, since Mimihagi is immune to Yhwach's ability to see the future.

http://mangaseeonline.us/read-online/Bleach-chapter-617-page-9.html

Then he fires an attack downwards to Soul Society.

http://mangaseeonline.us/read-online/Bleach-chapter-620-page-18.html

Now we get the same feat from the perspective of the people in Soul Society.

http://mangaseeonline.us/read-online/Bleach-chapter-621-page-1.html

We see when Yhwach absorbs Mimihagi.

http://mangaseeonline.us/read-online/Bleach-chapter-621-page-3.html

Seconds later, in the next page we see the attack that Yhwach launched reached them.

http://mangaseeonline.us/read-online/Bleach-chapter-621-page-4.html

Since we have the two panel scene, and prior to this people were talking the timeframe couldn't be more than a minute or 60 seconds.

* 14,652,000,000 meters / 1 minute = 244,200,000 m/s or Mach 717623.2

Outlier? No. Why?

* Yhwach's Light Beam proof this by travelling the same straight distance in seconds as well.

http://mangaseeonline.us/read-online/Bleach-chapter-603-page-17.html

http://mangaseeonline.us/read-online/Bleach-chapter-604-page-4.html

http://mangaseeonline.us/read-online/Bleach-chapter-603-page-15.html

* Is not Pseudo Light as the tree of life can't absorb the light.

http://mangaseeonline.us/read-online/Bleach-chapter-604-page-9.html

http://mangaseeonline.us/read-online/Bleach-chapter-604-page-10.html

http://mangaseeonline.us/read-online/Bleach-chapter-600-page-14.html

* Ichibei who fought Yhwach has a casual feat.

http://mangaseeonline.us/read-online/Bleach-chapter-605-page-12.html

http://www.convert-me.com/en/convert/length/jri.html?u=jri&v=1%2C000

Conclusion. Mimihagi and three of Yhwach's techniques cover the same distance in seconds.

The Black Ray of Darkness, his Light Beam and when he transported the Seireitei structures towards the Soul King Dimension.

http://mangaseeonline.us/read-online/Bleach-chapter-627-page-9.html

http://mangaseeonline.us/read-online/Bleach-chapter-627-page-10.html

http://mangaseeonline.us/read-online/Bleach-chapter-627-page-11.html

http://mangaseeonline.us/read-online/Bleach-chapter-627-page-12.html

http://mangaseeonline.us/read-online/Bleach-chapter-627-page-13.html

http://mangaseeonline.us/read-online/Bleach-chapter-627-page-14.html

Thoughts?