How tall is the Burj Khalifa, in feet?

How to get close to this number

The explanation gives the metric height, so this is a unit conversion: multiply metres by about three point three. Any question asking for a famous dimension in an unfamiliar unit is a conversion problem, and converting from the figure you know is safer than recalling the one you do not.

The comparison is the useful calibration: nearly twice the Empire State Building. Anchoring one landmark against another is how tall-building questions become tractable, and this site's companion question gives the other half of the pair directly.

The record's durability is the interesting part: still the tallest more than a decade after opening, which is unusual in a category that changed hands repeatedly through the twentieth century. The next contender would be the first building past a kilometre, and it has been stalled for years — records stop falling when the next step requires solving a genuinely new problem.