The fastest way to calculate how strong Iron Man’s suit is to compare it to a speeding bullet. On the right is a problem that calculates Iron Man versus .40 S&W Caliber Gun (Cleophysics). The objective is to find how much force the gun exerts on Iron Man and how much force Iron Man can endure (Iron Man, in this experiment, wearing a Nickel Titanium suit).

      From the calculations, it is concluded that the bullet only exerts about .5% of what Iron Man can endure. Although this doesn’t account for ricocheting bullets, having a bullet exert only about .5% of Iron Man’s max force, shows how strong his armour is.
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