[aylons]

According to the Hacker's Diet [1], 3.500 Calories is equivalent to a pound.

[1] Admittedly poor reference, but in tone with the Hacker News. Also, the author most probably sources from the same reference the article does for the traditional conversion and I trust him to not mess up with units.

[PeterWhittaker]

Hmm, OK. Doesn't explain how the "3,500 kJ per pound" got in there - perhaps I still have optimistically high expectations, but I would have hoped that somewhere along the line the author or their editor would have noted that a pound cannot be equivalent to both 3.5 Mcal and 3.5 MJ. But mayhaps I wax pedantic.

[aylons]

You're right, I was also very surprised by this error and have commented on it as soon as this was posted. I just wanted to elucidate the correct value.