How big is the universe in kilometers?
Size of our universe is greater than
trillion billion km.
1 billion = 1000000000
1 trillion = 1000000000000
1 year = 365.256363 X 24 X 60 X 60 s = 31558150 s
1 light second =299792.258 km
1 AU = a for the elliptic orbit = 149597671 km
1 light year = 65242 AU
The 5-sd approximation to a minimum, for the size ( diameter ) of
2 X 13.799 billion light years (bly).
This being a 5-sd approximation, the number of sd in the answer
is restricted to 5-sd, for reliability.
In AU, this is #13.799 X 6.3242= 872.676 billion AU
In km uni, this is
=130.55 trillion billion km.
Important note: This is all about universe and not the holistic
surmise, for our universe, based on our Big Bang theory and