How many LIGHT YEARS in 1 astronomical unit? The answer is 1.5812507409821E-5. We assume you are converting between light year and astronomical unit. You can view more details on each measurement unit: LIGHT YEARS or astronomical unit The SI base unit for length is the metre. 1 metre is equal to 1.0570008340246E-16 LIGHT YEARS, or 6.6845871222684E-12 astronomical unit. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between light years and astronomical units. Type in your own numbers in the form to convert the units!
1 LIGHT YEARS to astronomical unit = 63241.07708 astronomical unit
2 LIGHT YEARS to astronomical unit = 126482.15417 astronomical unit
3 LIGHT YEARS to astronomical unit = 189723.23125 astronomical unit
4 LIGHT YEARS to astronomical unit = 252964.30834 astronomical unit
5 LIGHT YEARS to astronomical unit = 316205.38542 astronomical unit
6 LIGHT YEARS to astronomical unit = 379446.46251 astronomical unit
7 LIGHT YEARS to astronomical unit = 442687.53959 astronomical unit
8 LIGHT YEARS to astronomical unit = 505928.61667 astronomical unit
9 LIGHT YEARS to astronomical unit = 569169.69376 astronomical unit
10 LIGHT YEARS to astronomical unit = 632410.77084 astronomical unit
You can do the reverse unit conversion from astronomical unit to LIGHT YEARS, or enter any two units below:
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).
The astronomical unit (AU or au or a.u. or sometimes ua) is a unit of length defined to be exactly equal to 149,597,870,700 metres. Historically, the astronomical unit was conceived as the average Earth-Sun distance (the average of Earth's aphelion and perihelion), before its modern redefinition.
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".
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