I feel it's really weird that Ainz and the Guardians have Athletic Lifting Strength when they're probably greatly stronger than that, so I thought I'd calc, like, the only significant lifting feat I could find in the anime. If there's anything better in the web novel, someone ring me up.
The Calc[]
The Feat: https://youtu.be/LcRXL6NlUmc?t=71
Measurements:
Man, this being a cube makes this so much easier.
Demiurge is 181 cm tall.
181 cm = 42 px
181 * 354 / 42 = One Length is 1525.57 cm.
1525.57 * 1525.57 * 1525.57 = 3550556430.35 cm cubed.
Granite has a density of 2.75 g/cm cubed.
2.75 * 3550556430.35 = 9764030183.46 g, or 9764030 kg, Class M
I feel like top-tiers like Ainz, Shalltear, Albedo, and even some of the weaker guardians should scale, as although this feat is performed by one of the physically strongest inhabitants of Nazarick, they should at least be comparable in physical strength.