For all those wondering how much Thor’s Mjölnir weighs, astrophysicist Neil deGrasse Tyson actually has an answer for you. That’s 300 billion elephants. Pretty heavy, isn’t it? That’s over 2 billion kilograms, according to the video below. According to our computation here at HighT3ch, assuming that the average full-grown elephant weighs 6,500 kilograms, that’s 1.95 billion kilograms.