How many astronomical unit in 1 light-year?
The answer is 63241.077088071.
We assume you are converting between astronomical unit and light year.
You can view more details on each measurement unit:
astronomical unit or light-year
The SI base unit for length is the metre.
1 metre is equal to 6.6845871226706E-12 astronomical unit, or 1.0570008340246E-16 light-year.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between astronomical units and light years.
Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from light-year to astronomical unit, or enter any two units below:
astronomical unit to stadium
astronomical unit to rod
astronomical unit to shackle
astronomical unit to centimetro
astronomical unit to gnat's eye
astronomical unit to kiloyard
astronomical unit to perch
astronomical unit to range
astronomical unit to quadrant
astronomical unit to football field
The astronomical unit (AU or au or a.u. or sometimes ua) is a unit of length. It is approximately equal to the mean distance between the Earth and Sun. The currently accepted value of the AU is 149 597 870 691 ± 30 metres (about 150 million kilometres or 93 million miles).
The symbol "ua" is recommended by the Bureau International des Poids et Mesures, but in the United States and other anglophone countries the reverse usage is more common. The International Astronomical Union recommends "au" and international standard ISO 31-1 uses "AU".
A light year, abbreviated ly, is the distance light travels in one year: roughly 9.46 × 1012 kilometres (9.46 petametres, or about 5.88 × 1012 (nearly six trillion) miles). More specifically, a light year is defined as the distance that a photon would travel, in free space and infinitely far away from any gravitational or magnetic fields, in one Julian year (365.25 days of 86400 seconds each).
ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!