Solar radii (R☉)
The solar radius is the radius of the Sun, 695,700 km, used as a unit for the sizes of stars.
Convert solar radii to any length unit
1 solar radius = 27,389,763,780 inches
Quick facts
- Unit
- Solar radius (plural: solar radii)
- Symbol
- R☉
- Measures
- Length / Distance
- System
- Astronomical
- Equals
- 695,700,000 meters
- Definition
- The nominal radius of the Sun, 695,700 km (IAU 2015).
1 solar radius in other units
| Inches | 27,389,763,780 in |
| Meters | 695,700,000 m |
| Centimeters | 69,570,000,000 cm |
| Feet | 2,282,480,315 ft |
| Kilometers | 695,700 km |
| Miles | 432,287.9384 mi |
| Millimeters | 695,700,000,000 mm |
| Yards | 760,826,771.7 yd |
What is a solar radius?
The solar radius is the radius of the Sun, 695,700 km, used as a unit for the sizes of stars. Betelgeuse, a red supergiant, is roughly 700–1,000 solar radii.
Where the solar radius sits among length units
The solar radius is number 218 of 231 on our scale of length units, ordered from smallest to largest.
Solar radii in real life
One solar radius is about 1.8 trips to the Moon laid end to end, or about 17 trips around the Earth laid end to end, or about 55 Earth diameters laid end to end, or about 155 New York–Los Angeles drives laid end to end.
Top solar radius conversions
Common amounts of solar radii
Convert solar radii to all 230 other units
Metric (SI)
- R☉ to m
- R☉ to cm
- R☉ to km
- R☉ to mm
- R☉ to µm
- R☉ to nm
- R☉ to dm
- R☉ to pm
- R☉ to fm
- R☉ to dam
- R☉ to hm
- R☉ to Gm
- R☉ to Mm
Imperial & US customary
- R☉ to in
- R☉ to ft
- R☉ to mi
- R☉ to yd
- R☉ to ftm
- R☉ to fur
- R☉ to hh
- R☉ to th
- R☉ to ch
- R☉ to lea
- R☉ to rd
- R☉ to cubit
- R☉ to barleycorn
- R☉ to li
- R☉ to span
- R☉ to line
- R☉ to ell
- R☉ to palm
- R☉ to Ramsden's chain
- R☉ to finger
- R☉ to nail
- R☉ to shaftment
US survey
Nautical
Astronomical
- R☉ to ly
- R☉ to au
- R☉ to pc
- R☉ to kpc
- R☉ to Mpc
- R☉ to R⊕
- R☉ to ls
- R☉ to light-minute
- R☉ to LD
- R☉ to Gpc
- R☉ to light-day
- R☉ to light-hour
- R☉ to RJ
- R☉ to light-week
- R☉ to Hubble length
- R☉ to siriometer
Scientific & atomic
Ancient
- R☉ to Roman mile
- R☉ to royal cubit
- R☉ to stadion
- R☉ to Biblical cubit
- R☉ to Roman foot
- R☉ to Greek foot
- R☉ to Roman pace
- R☉ to parasang
- R☉ to Egyptian common cubit
- R☉ to Egyptian digit
- R☉ to Egyptian palm
- R☉ to Gallic league
- R☉ to Greek cubit
- R☉ to Greek finger
- R☉ to Roman cubit
- R☉ to Roman digit
- R☉ to Roman inch
- R☉ to Roman palm
- R☉ to Roman stadium
- R☉ to Roman step
- R☉ to handbreadth
- R☉ to Biblical finger
- R☉ to Biblical parasang
- R☉ to Biblical span
- R☉ to Greek palm
- R☉ to Greek span
- R☉ to Sabbath day's journey
- R☉ to Talmudic mil
- R☉ to bema
- R☉ to beru
- R☉ to day's journey
- R☉ to diaulos
- R☉ to dichas
- R☉ to hippikon
- R☉ to iteru
- R☉ to khet
- R☉ to kondylos
- R☉ to kush
- R☉ to nindan
- R☉ to orgyia
- R☉ to plethron
- R☉ to pygme
- R☉ to reed
- R☉ to remen
- R☉ to shu-si
- R☉ to ush
East & Southeast Asian
- R☉ to 里
- R☉ to 尺
- R☉ to 寸
- R☉ to 尺
- R☉ to 里
- R☉ to 間
- R☉ to 寸
- R☉ to wa
- R☉ to 리
- R☉ to 丈
- R☉ to 步
- R☉ to 分
- R☉ to 厘
- R☉ to 分
- R☉ to 치
- R☉ to 町
- R☉ to 자
- R☉ to 丈
- R☉ to khuep
- R☉ to kujirajaku
- R☉ to nio
- R☉ to sen
- R☉ to sok
- R☉ to 引
- R☉ to yot
- R☉ to 厘
- R☉ to 푼
- R☉ to 毫
- R☉ to 忽
- R☉ to kraphiat
- R☉ to 毛
- R☉ to 丝
South Asian & Middle Eastern
- R☉ to gaj
- R☉ to kos
- R☉ to yojana
- R☉ to angul
- R☉ to farsakh
- R☉ to hasta
- R☉ to arsin
- R☉ to barid
- R☉ to danda
- R☉ to dhira
- R☉ to qasaba
European (pre-metric)
- R☉ to Swedish mil
- R☉ to versta
- R☉ to arshin
- R☉ to lieue
- R☉ to ligne
- R☉ to pied du roi
- R☉ to sazhen
- R☉ to toise
- R☉ to Irish mile
- R☉ to Prussian mile
- R☉ to Russian mile
- R☉ to Scottish mile
- R☉ to pouce
- R☉ to vershok
- R☉ to Danish mile
- R☉ to French point
- R☉ to Prussian ell
- R☉ to Prussian foot
- R☉ to Prussian inch
- R☉ to Prussian rod
- R☉ to Rhineland rod
- R☉ to Russian foot
- R☉ to Swiss hour
- R☉ to aln
- R☉ to aune
- R☉ to duim
- R☉ to dyuym
- R☉ to famn
- R☉ to liniya
- R☉ to pyad
- R☉ to Welsh mile
- R☉ to fjardingsvag
- R☉ to tochka
Spanish & Portuguese
- R☉ to Castilian vara
- R☉ to Spanish league
- R☉ to Texas vara
- R☉ to pulgada
- R☉ to Castilian foot
- R☉ to Mexican vara
- R☉ to braca
- R☉ to legua
- R☉ to Portuguese foot
- R☉ to Portuguese vara
- R☉ to palmo
- R☉ to polegada
- R☉ to Spanish pace
- R☉ to linea
- R☉ to linha
- R☉ to punto
Everyday comparisons
- R☉ to American football field
- R☉ to marathon
- R☉ to smoot
- R☉ to Earth circumference
- R☉ to Eiffel Tower height
- R☉ to Olympic pool length
- R☉ to banana
- R☉ to double-decker bus
- R☉ to soccer pitch length
- R☉ to Mount Everest height
- R☉ to blue whale length
- R☉ to credit card length
- R☉ to human hair width
- R☉ to Burj Khalifa height
- R☉ to Earth diameter
- R☉ to Empire State Building height
- R☉ to Statue of Liberty height
- R☉ to human height
- R☉ to giraffe height
- R☉ to grain of rice
- R☉ to paperclip length
- R☉ to pencil length
- R☉ to sheppey
- R☉ to smartphone length
Convert to solar radii
Frequently asked questions
What is a solar radius?
The solar radius is the radius of the Sun, 695,700 km, used as a unit for the sizes of stars.
How is the solar radius defined?
The nominal radius of the Sun, 695,700 km (IAU 2015).
How many inches are in a solar radius?
One solar radius equals 27,389,763,780 inches.
How many meters are in a solar radius?
One solar radius equals 695,700,000 meters.
How many centimeters are in a solar radius?
One solar radius equals 69,570,000,000 centimeters.