Uranus has a mass of 8.6810 x 1025 kg or 86,810,300,000,000,000,000,000,000 kg which is 14.536 of Earth’s mass. Uranus’s mass is the fourth highest of all planets in our solar system. Mass is just how much matter an object contains, for Uranus this matter is ice liquid, ammonia and methane.
Since mass = density x volume, it is intuitive to calculate the mass of Uranus. Its density is 1.27 g/cm3 which is 0.23 of Earth’s density. Its volume is 68,334,355,695,584 km3 which is 63.085 of Earth’s volume. So to get mass in kg we must convert 1.27 g/cm3 to 1,270 kg/m3 and convert 68,334,355,695,584 km3 to 68,334,355,695,584,000,000,000 m3. Now if we multiply these 2 numbers we get 8.68 x 1025 kg.