How many megametre in 1 astronomical unit?
The answer is 149597.870691.
We assume you are converting between megametre and astronomical unit.
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megametre or astronomical unit
The SI base unit for length is the metre.
1 metre is equal to 1.0E-6 megametre, or 6.6845871226706E-12 astronomical unit.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between megameters and astronomical units.
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You can do the reverse unit conversion from astronomical unit to megametre, or enter any two units below:
A megametre (American spelling: megameter, symbol: Mm) is a unit of length equal to 10^6 metres (from the Greek words megas = big and metro = count/measure). Its customary equivalent is 621.37 miles.
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".
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