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How Big Is a Betelgeuse?

A betelgeuse is about 7.09 AU across. That is about 620 billion times as wide as the average man is tall. A red supergiant star in Orion.

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How big is a betelgeuse compared to the average man?

A betelgeuse is about 620 billion times as wide as the average man is tall. A betelgeuse is 620 billion× the size of the average man: about 620 billion average men lined up would match it. By volume, about 9.88 undecillion (9.9 × 10³⁶) average men would fit inside a betelgeuse.

Betelgeuse size facts

Betelgeuse is about 760 times wider than the Sun; estimates range from about 640 to 1,000 times.
Placed where the Sun is, it would reach past the orbit of Mars.

How does a betelgeuse compare to other things?

A betelgeuse next to 23 things of similar size, plus some everyday references:

Thing	Size	Compared to Betelgeuse
TON 618 (black hole)	1,600 AU across	226× bigger
Solar System	60.2 AU across	8.5× bigger
VY Canis Majoris	13.2 AU across	6.15 AU bigger
Rigel	0.735 AU across	9.6× smaller
Sagittarius A* (black hole)	15,800,000 miles (25,400,000 km) across	41.7× smaller
Sirius A	1,480,000 miles (2,380,000 km) across	445× smaller
Sun	865,000 miles (1,393,000 km) across	761× smaller
Proxima Centauri	134,000 miles (215,000 km) across	4,930× smaller
Jupiter	86,900 miles (139,800 km) across	7,580× smaller
Saturn	72,400 miles (116,500 km)	9,100× smaller
Uranus	31,500 miles (50,720 km) across	20,900× smaller
Neptune	30,600 miles (49,240 km) across	21,500× smaller
Earth	7,920 miles (12,740 km) across	83,200× smaller
Venus	7,520 miles (12,100 km) across	87,600× smaller
Mars	4,210 miles (6,779 km) across	156,000× smaller
Mercury	3,030 miles (4,879 km) across	217,000× smaller
Moon	2,160 miles (3,475 km) across	305,000× smaller
Pluto	1,480 miles (2,377 km) across	446,000× smaller
Mount Everest	5.5 miles (8.849 km)	120 million× smaller
Eiffel Tower	1,083 ft (330 m)	3.21 billion× smaller
School bus	40 ft (12.2 m) long	86.9 billion× smaller
Average man (world)	5 ft 7 in (171 cm)	620 billion× smaller
Average woman (world)	5 ft 3 in (159 cm)	667 billion× smaller

Where do these numbers come from?

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