lcLength Converter
Convert

Light Year to Astronomical Unit Converter

1 ly = 0.000016 au · exact factor

Fromly
=
Toau
12648174677.5290
formulaau = ly × 63240.87338764508

Quick conversions

Common conversions

lyau
1 ly63240.8734 au
5 ly316204.3669 au
10 ly632408.7339 au
20 ly1264817.4678 au
50 ly3162043.6694 au
100 ly6324087.3388 au

About this conversion

The light-year (ly) is a unit of length in the astronomical, commonly used for distances to nearby stars and sizes of galaxies. The astronomical unit (au) belongs to the astronomical and is typically found in measurements related to distances between planets and orbital radius of planets. By definition, one light-year is the distance light travels in one Julian year in a vacuum, approximately 9.461 × 10¹⁵ meters. One astronomical unit is approximately 149,597,870.7 km — the mean distance from Earth to the Sun. The conversion factor between these two units is 63240.87338764508: multiplying any value in ly by this number gives the equivalent in au. For example, 10 ly equals 632408.7339 au. Going the other direction, 1 au equals 0.000016 ly.

Examples

  • 200000 ly to au = 12648174677.5290 au
  • 200000 ly in au is 12648174677.5290 au
  • 200000 ly equals 12648174677.5290 au
  • Convert 200000 ly to au: 12648174677.5290 au
  • How much is 200000 ly in au? 12648174677.5290 au
  • What is 200000 ly in au? 12648174677.5290 au
  • 200000 ly converted to au is 12648174677.5290 au
  • 12648174677.5290 au is equal to 200000 ly

Frequently asked questions

1 light-year is equal to exactly 63240.87338764508 astronomical unit (and conversely, 1 astronomical unit = 0.000016 light-year). This factor is fixed by international definition and does not vary.