How much does a black hole weigh?

Hint: The mass of any heavy object in space such as galaxy or any star similar to the Sun is expressed in terms of ‘solar mass’. A black hole is a region where the gravitational pull is strong and no light can escape from it.

Complete answer:
German astronomer Karl Schwarzschild was the first one to calculate the mass of the black hole in 1916.
Solar mass means the mass of our Sun which is around $1.989 \times 10^{30}kg$ which can be taken as $2 \times 10^{30}kg$. This implies that the mass of the Sun is a million times higher than the mass of the Sun.
When a mass unlike a Sun dies, given a term as supernova, the outcome of the explosion is either a white dwarf or a neutron star or a stellar black hole depending on the remaining mass of the core of the star.
If the mass of the star exceeds the Oppenheimer-Volkoff limit then the core of the supernova turns out to be black hole which will be around the mass higher than twice the solar mass.
Generally, a typical black hole weighs from about 3 to 10 solar masses. Depending on the mass of the black hole, they are categorized as super massive black holes, intermediate and heavy.
The intermediate black hole’s mass ranges from 100 to 1000 solar masses.

Note:
The mass of any object in space, heavier than the sun are measured in terms of solar masses for simple calculation. In the Universe, the black holes are the only entity which weighs more than any other objects.