The Superhero Database Classification number, or SHDB Class, is a number that represents the overall 'power' of a character. All traits of a character are used for calculating the Classification.
What it DOESN'T mean
This doesn't mean that a higher class would always beat a lower class character. But the bigger the difference in Class is, the more obvious it is who'll win in a fight.
How is this calculated
( INT^1.3 + (STR*0.5 )^2 + (SPE*0.5)^2 + DUR^1.6 + (POW + (SPS*SPL))^2 + COM^1.8 ) ^ TIER
Super Power Score and Level
Every Super Power has a score (SPS) that is used to calculate the Class. Each Super Power also has 3 levels (SPL). The level is set when connecting that Super Power to a character. The level determines the final score, of the Super Power, being used in the calculation.
...So an attempt to calculate the power of Homelander’s laser beam, using as an example the scene where he destroys the plane of the mayor of Baltimore in the first season. We gonna assumes that Homelander simply melts the fuselage of the plane, which is made of aluminum, and uses the following equation:
p=tc×m×dt​
Where:
p is the power (W = J/s)
c is the specific heat (J/ (kg K))
m is the mass of the material (kg)
dt is the temperature variation (K)
t is the time (s)
Estimating that Homelander takes 1 second to cut through the entire height of the plane, which is 1.8 m, and that the diameter of the laser beam is equal to the diameter of his iris, which is 0.013 m. And also estimating that the fuselage is 0.4 m thick and that it represents half of the total mass of the plane, which is 9071 kg. We gonna uses the values of 870 J/ (kg K) for the specific heat of aluminum and 660 °C for its melting point. Substituting these values in the equation, we obtains a result of 367.1 kW for the power of the laser beam.
To know what is the temperature of the laser beam, we need to use another equation that relates power with area and intensity of electromagnetic radiation. This equation is:
P=AσT4
Where:
P is the power (W)
A is the area (m$^2$)
σ is Stefan-Boltzmann’s constant (5.67×10−8 W/ (m$^2$ K$^4$))
T is temperature (K)
Assuming that the laser beam has a cylindrical shape and that it emits radiation uniformly in all directions, we can calculate area as:
A=2πrL+2πr2
Where:
r is cylinder’s radius (m)
L is cylinder’s length (m)
If we consider that cylinder’s radius is equal to Homelander’s iris diameter, that is, 0.013 m, and that cylinder’s length is equal to distance between his eyes and plane, which we can estimate as 10 m, then area is:
A=2π×0.013×10+2π×0.0132
A=0.0165 m2
Substituting this value and power value in power equation, we have:
367100=0.0165×5.67×10−8×T4
Solving for T, we have:
T=40.0165×5.67×10−8367100​​
T=12051 K
That is, Homelander’s laser beam temperature would be about 12051 K, or 11778 °C.
THAT MEANS this is almost twice as hot as Sun’s surface, which has an average temperature of about 5800 K.
Now comparing both temperatures... we need to understand that the heating temperature of a truck during reentry depends on several factors, such as the angle, speed, shape and material of the vehicle.
However, a study by NASA shows that the maximum temperature on the front part of a reentry vehicle can reach 1510 °C (you can see in the link right here : https://space.stackexchange.com/questions/15038/what-are-the-top-temperatures-occurring-during-reentry), and that the temperature in the air layer just above the surface can reach 5500 °C.
Therefore, even considering the highest possible temperature in reentry, it would still be lower than Homelander’s laser beam temperature.
...So HOMELANDER STOMP!