Introduction[]
In Fairy Tail 100 Year Quest, Gajeel becomes a Big Boi thanks to Brandish. I will be using the same measurements of Aldoron as this calc here. I will calc his AP via the KE and Inverse Square Methods.
Aldoron Arm Width = 7692.51 Meters = 49.5 px
7692.51 Meters/49.5 px = 155.404 Meters per px
Aldoron Head Height = 41.63 px = 6469.4685 Meters
Aldoron Head Height = 6469.4685 Meters = 242.97 px
6469.4685 Meters/242.97 px = 26.6266 Meters per px
Big Boi Gajeel Height = 1270.87 px = 33838.947 Meters
KE Method[]
Average Human Height = 1.7 Meters
Average Human Weight = 62 Kg
Square Cube Law: Mass = (Big Boi Gajeel's Height/Small Boi Gajeel's Height)^3*Small Boi Gajeel's Weight
(33838.947 Meters/1.7 Meters)^3*62 Kg = 4.889849e+14 Kg
Now for speed, Gajeel is a superhuman who can move as Sub-Relativistic speeds, however since using that would be calc stacking, I'll find the proportional distance he can run another way. Usain bolt can move 12.5171 Meters in 1 second, so I'll find the proportional distance Gajeel runs in the same timeframe by using cross multiplication.
(1.7 Meters/12.5171 Meters) = (33838.947 Meters/X Meters) = 249156.166761 Meters
Velocity = (249156.166761 Meters)/(1 Second) = (249156.166761 m/s)
KE = (0.5)*(Mass)*(Velocity^2)
(0.5)*(4.889849e+14)*(249156.166761^2) = 3.6 Petatons (Continent level+)
Inverse Square Method[]
Big Boi Gajeel's Height = 33838.947 Meters
Human Height = 1.684 Meters
Human Striking Strength = 70 Joules
(70 Joules)*(33838.947 Meters/1.684 Meters)^5 = 54.8 Teratons (Country level+) ACCEPTED