One Punch Man: The True Power of Boros’s Moon Kick

One Punch Man chapter 36

One of the most iconic moments in the fight between Saitama and Boros is when Boros kicks Saitama from Earth to the Moon in just a few seconds, showcasing his overwhelming physical strength. But how powerful was that kick? Let’s estimate it using the available information.

One Punch Man chapter 36

To measure the kick’s power through kinetic energy, we need two values: Saitama’s mass and the velocity he reached before impacting the Moon.

One-Punch Man: Hero Encyclopedia

Boros’s Moon Kick – Power Analysis

According to the official guide, Saitama’s mass is 70 kg.
The distance traveled is 384,400 km, the average Earth–Moon distance.

For time, the anime shows the trip taking about 3 seconds. In the manga, the event occurs across only two panels; given how fast it happens, using the anime’s 3-second window is a reasonable and conservative estimate.

Velocity:

V = 384,400,000 m / 3 s = 128,433,333 m/s,
about 42% the speed of light.

Kinetic Energy:

KE = ½ · m · v²
KE = 0.5 · 70 · (1.284 × 10⁸)² ≈ 5.17 × 10¹⁷ joules,
or ~123 megatons of TNT.

That single kick is roughly 6,150 times more powerful than a 20-kiloton nuclear bomb.

Force of the Kick

Beyond energy, we can also estimate the force applied using impulse:

F = Δp / Δt = m · v / t

Where:

m = 70 kg

v = 128,433,333 m/s

t = 0.2 s (a typical contact time for elite-level strikes, reasonable for Boros at full power)

Force:

F = (70 · 1.28 × 10⁸) / 0.2 ≈ 4.5 × 10¹⁰ newtons,
or ~44.9 giganeutons (~4.6 million tons of force).

For comparison, this is like having over 12 Empire State Buildings dropped on you at once.
Even more striking, Boros’s kick is about 1,200 times more powerful than the thrust of the Saturn V rocket, the most powerful rocket ever built.

A single strike—delivered casually—operating at near-relativistic levels of power. Even with conservative assumptions, Boros’s kick reaches near-relativistic speeds and nuclear-level energies, confirming that his physical strength alone operates on a catastrophic, almost absurd scale.

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