How many feet in 1 astronomical unit? The answer is 490806662401.57. We assume you are converting between foot and astronomical unit. You can view more details on each measurement unit: feet or astronomical unit The SI base unit for length is the metre. 1 metre is equal to 3.2808398950131 feet, 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 feet and astronomical units. Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from astronomical unit to feet, or enter any two units below:
A foot (plural: feet) is a non-SI unit of distance or length, measuring around a third of a metre. There are twelve inches in one foot and three feet in one yard.
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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