How many light-hour in 1 astronomical unit? The answer is 0.13861243995449. We assume you are converting between light hour and astronomical unit. You can view more details on each measurement unit: light-hour or astronomical unit The SI base unit for length is the metre. 1 metre is equal to 9.2656693110598E-13 light-hour, 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 hours and astronomical units. Type in your own numbers in the form to convert the units!
1 light-hour to astronomical unit = 7.21436 astronomical unit
5 light-hour to astronomical unit = 36.0718 astronomical unit
10 light-hour to astronomical unit = 72.1436 astronomical unit
15 light-hour to astronomical unit = 108.2154 astronomical unit
20 light-hour to astronomical unit = 144.28719 astronomical unit
25 light-hour to astronomical unit = 180.35899 astronomical unit
30 light-hour to astronomical unit = 216.43079 astronomical unit
40 light-hour to astronomical unit = 288.57439 astronomical unit
50 light-hour to astronomical unit = 360.71798 astronomical unit
You can do the reverse unit conversion from astronomical unit to light-hour, or enter any two units below:
A light-hour (also written light hour) is a unit of length. It is the distance travelled by light in vacuum in one hour. Based on the current definition of the metre a light-hour is equal to 1,079,252,848,800 metres (~1.08 Tm).
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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