The world record for the high jump for humans is 8.04 feet. And according to the Guinness Book of Records, a Chinese acrobat once made a vertical jump 8.07 feet through a hoop.
A cat may not be able to match that, but let's be fair – a cat is less than two feet tall! However, your average house cat can achieve a vertical jump to a height of five feet or more (without running), which may be as much as seven times her height. We don't know the height of the aforementioned human record holder high jumpers are, but if they were four feet tall, they'd be jumping to only twice their height!