What is the water vs land percentage on Uranus?

Answer 1

Your question supposes that Uranus is a bit like Earth, with water and land on its surface. In fact, it is nothing at all like Earth, so your questions cannot be answered.

First of all, Uranus is extremely cold, so there is no liquid water on the planet - only very, very cold ice.

All we can see of the planet is the upper or outer part of its atmosphere, which is a mixture of the very light gases hydrogen and helium, mixed with a kind of snowstorm of crystals of methane, ammonia, water and oil. Deep under this outer layer, the ice clouds contain more water ice and less methane ice, and deeper still, you would gradually discover yourself in a very strange, dense fluid composed of a mixture of water and ammonia ice together with hydrogen and rocky rubble. There is no surface separating the ice clouds from the dense mantle - just a gradual transition from one to the other. Right in the middle of the planet is a dense rocky rubble of ice and iron, nickel and silicate, but you could not tell when you left the mantle and entered the core - the planet has no solid surface, and hence no "land". This core has about half, and the mantle around it about 13 times, the mass of our planet.

Uranus is not only the coldest planet in the solar system, but it has another strange characteristic, too. All the planets orbit the Sun in the same plane - in other words, if you put a ball in the middle of a field as a model of the sun, models of the planets would orbit on the field's surface. As they orbit the Sun, they rotate around their own axes, which are oriented "up" and "down" relative to the orbital plane. In this way, their equators are roughly in the same plane as their orbits. Uranus is the exception. Unlike all the other planets, it rotates around an axis that is almost in the orbital plane, so its equator is vertical relative to its orbit. Uranus has rings, like Saturn, but because it lies down as it orbits, sometimes we see the rings edge on, and sometimes flat on, when they look like a circular target centred on this odd ice giant.

Answer 2

Uranus is a gas giant made up primarily of hydrogen and helium, with no solid surface to speak of. It does not have a distinct separation between water and land like Earth does.