In exactly how many generations will our sun explode

the sun will begin to burn up our planet in about 4 billion years(become too hot for life), but the sun will actually "explode" or go dark in about 20 billion years, so you can multiply 20 billion years times 1 century divided by 100 years(which is approximately how long a person lives) and that will give you the number of generations away. The answer is 200, 000, 000 billion centuries, or 200, 000, 000 generations away, which is a lot. note on how to calculate on paper: the thousandths place has 3 places to the right, the millionth place has 7 places, and the billionths place has 9 places. and of course, we know 1 goes into 2 twice, so that makes it easy. so that's billions and billions of greats!! if humanity can find a way to make it beyond our solar system, i hope :)

sun will not explode. sun dont have enough mass to explode and to go supernova.
it will turn red giant once all hydrogen is fuse and all converted into helium and finally carbon and it will turn to white dwarf star.
this will happen after another 4 billion yrs. dont need to count generation. dont tense urself.

Well traditionaly a generation is 20 years but today it is a more conservative of 25 years.

The Sun's end is estimated around 4.5 billion years from now. Lets assume there is no give and take of a billion years, and 4.5 billion is the exact number.
So 4.5 billion / 25 = 180,000,000 generations.

Trillions of trillions generations, since our average period of current generation is about 60 years (an average lifespan of a single human being, one generation & which is decreasing) & our sun would become a whit dwarf after next roughly 9 billion years.

The Sun will never explode. Instead over the next 5 billion years it will gradually expand eventually turning into a red giant then final a white dwarf star. The Sun does not have enough mass to ever become a supernova and explode.

That entirely depends on how many years there are in a generation - it's a bit of a variable constant......

The Sun will never actually explode, merely slowly expand....

Humanity will be a far distant memory in the annuls of the Universe before our Sun explodes.

Generations of what? No species lasts that long.

Lots and lots.