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AU to Light Years Converter

Convert astronomical units to light years with accurate formulas, examples and conversion tables.

Length conversion

Calculator

Results update instantly. Use Calculate to confirm the current conversion.

Decimals and negative values are supported.

Result

0.00001581 ly

1 AU ≈ 0.00001581 ly

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Open a focused converter for a commonly searched length conversion.

Centimeters to Inches1 cm = 0.39370079 inInches to Centimeters1 in = 2.54 cmMeters to Feet1 m = 3.2808399 ftFeet to Meters1 ft = 0.3048 mKilometers to Miles1 km = 0.62137119 miMiles to Kilometers1 mi = 1.609344 kmMillimeters to Inches1 mm = 0.03937008 inInches to Millimeters1 in = 25.4 mmYards to Meters1 yd = 0.9144 mMeters to Yards1 m = 1.0936133 yd

Conversion table

Common astronomical units to light years values, generated from the selected units.

astronomical units (AU)light years (ly)
1 astronomical unit0.00001581 light years
5 astronomical units0.00007906 light years
10 astronomical units0.00015813 light years
20 astronomical units0.00031625 light years
50 astronomical units0.00079063 light years
100 astronomical units0.00158125 light years

Conversion Formula

Divide the value in astronomical units by 63241.07708426628 to get light years.

Formulaly = AU ÷ 63241.07708426628

Example

Convert 1 astronomical unit to light years:

1 ÷ 63241.07708426628= 0.00001581 ly

Unit information

Concise reference information for the selected source and target units.

Astronomical unit (AU)

Scientific
1 AU = 149,597,870,700 m
Definition
One astronomical unit equals exactly 149,597,870,700 meters.
Usage
Used for distances within the solar system.

Light year (ly)

Scientific
1 ly = 9.460730472581e15 m
Definition
A light year is the distance light travels in vacuum during one Julian year.
Usage
Used to describe distances between stars and other objects beyond the solar system.
AU to Light Years tableReference chart and common astronomical unit-to-light year values.Light years to Astronomical unitsConvert light years to astronomical units.Astronomical units to MillimetersConvert astronomical units to millimeters.Astronomical units to CentimetersConvert astronomical units to centimeters.Astronomical units to MetersConvert astronomical units to meters.Astronomical units to KilometersConvert astronomical units to kilometers.Astronomical units to InchesConvert astronomical units to inches.Astronomical units to FeetConvert astronomical units to feet.

Frequently asked questions

How many light years are in 1 astronomical unit?

1 astronomical unit equals 0.000015812507 light years.

How do you convert astronomical units to light years?

Divide the value in astronomical units by 63241.07708426628 to get light years. The formula is ly = AU ÷ 63241.07708426628.

What is 10 astronomical units in light years?

10 astronomical units is approximately 0.00015813 light years.