How tall is the average kangaroo?

There is no "average" height of a kangaroo. It depends on the species.

Red Kangaroos are the largest of the kangaroos. The Red Kangaroo averages 1.6 meters (5.25 ft) tall. Accounts of sizes greater than this are not uncommon, with some large males reportedly reaching approximately 2 meters (6.6 ft).

The smallest known member of the very wide-ranging kangaroo family is the Musky Rat-kangaroo, which is about 23 cm long.

Various other members of the kangaroo family - of which there are over 60 - range in size between those two.
This varies according to the different species.

Red Kangaroos are the largest of the marsupials. The Red Kangaroo averages 1.6 metres tall. Accounts of sizes greater than this are not uncommon, with some large males reportedly reaching approximately 2 metres (6.6 ft).

The smallest known member of the very wide-ranging kangaroo family is the Musky Rat-kangaroo, which is about 23cm long.

Various other members of the kangaroo family - of which there are over 60 - range in size between those two.

You would have a real task on your hands finding any Eastern Greys, Western Greys or Reds reaching the size you quote. The Kangaroo industry has just about shot out all the biggest and the best at most they are only standing at full stretch up to 5 feet these days
It varies with the species. Some kangaroos are easily as tall as an adult human.

The average Red Kangaroo stands approximately 1.5 metres (4.9 ft) tall. Accounts of sizes greater than this are not uncommon, with some large males reportedly reaching approximately 2 metres (6.6 ft). The Red Kangaroo can weigh from 18kg (39 lb) up to 90 kilograms (198 lb) for very large specimens. The male is heavier, and tends to weigh an average of 65 kg (143 lb).

The smallest known member of the very wide-ranging kangaroo family is the Musky Rat-kangaroo, which is about 23cm long.
Kangaroos vary in size.

The average Red Kangaroo stands approximately 1.5 metres (4.9 ft) tall. Accounts of sizes greater than this are not uncommon, with some large males reportedly reaching approximately 2 metres (6.6 ft). The Red Kangaroo can weigh from 18kg (39 lb) up to 90 kilograms (198 lb) for very large specimens. The male is heavier, and tends to weigh an average of 65 kg (143 lb).

The smallest known member of the very wide-ranging kangaroo family is the Musky Rat-kangaroo, which is about 23cm long.

Various other members of the kangaroo family, of which there are over 60, range in size between those two.