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How Big Is the Observable Universe?

The observable universe is about 93 billion light-years across. That is about 515 septillion (5.1 × 10²⁶) times as wide as the average man is tall. Everything we could ever see from Earth, in every direction.

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How big is the observable universe compared to the average man?

The observable universe is about 515 septillion (5.1 × 10²⁶) times as wide as the average man is tall. The observable universe is 515 septillion× the size of the average man: about 515 septillion (5.1 × 10²⁶) average men lined up would match it.

Observable Universe size facts

The observable universe is about 93 billion light-years across.
It is wider than 2 × 13.8 billion light-years because space expanded while the light traveled.

How does the observable universe compare to other things?

The observable universe next to 23 things of similar size, plus some everyday references:

Thing	Size	Compared to Observable universe
Andromeda Galaxy	152,000 light-years across	611,000× smaller
Milky Way	100,000 light-years across	930,000× smaller
TON 618 (black hole)	1,600 AU across	3.67 trillion× smaller
Solar System	60.2 AU across	97.8 trillion× smaller
VY Canis Majoris	13.2 AU across	444 trillion× smaller
Betelgeuse	7.09 AU across	830 trillion× smaller
Rigel	0.735 AU across	8 quadrillion× smaller
Sagittarius A* (black hole)	15,800,000 miles (25,400,000 km) across	34.6 quadrillion× smaller
Sirius A	1,480,000 miles (2,380,000 km) across	370 quadrillion× smaller
Sun	865,000 miles (1,393,000 km) across	632 quadrillion× smaller
Proxima Centauri	134,000 miles (215,000 km) across	4.09 quintillion× smaller
Jupiter	86,900 miles (139,800 km) across	6.29 quintillion× smaller
Saturn	72,400 miles (116,500 km)	7.56 quintillion× smaller
Uranus	31,500 miles (50,720 km) across	17.3 quintillion× smaller
Neptune	30,600 miles (49,240 km) across	17.9 quintillion× smaller
Earth	7,920 miles (12,740 km) across	69.1 quintillion× smaller
Venus	7,520 miles (12,100 km) across	72.7 quintillion× smaller
Mars	4,210 miles (6,779 km) across	130 quintillion× smaller
Mount Everest	5.5 miles (8.849 km)	99.4 sextillion× smaller
Eiffel Tower	1,083 ft (330 m)	2.67 septillion× smaller
School bus	40 ft (12.2 m) long	72.1 septillion× smaller
Average man (world)	5 ft 7 in (171 cm)	515 septillion× smaller
Average woman (world)	5 ft 3 in (159 cm)	553 septillion× smaller

Where do these numbers come from?

Sizes are typical adult or reported values, rounded for readability. Read how we measure and compare sizes.