›› Convert metre to astronomical unit

meters
astronomical unit



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How many meters in 1 astronomical unit? The answer is 149597870691.
We assume you are converting between metre and astronomical unit.
You can view more details on each measurement unit:
meters or astronomical unit
The SI base unit for length is the metre.
1 metre is equal to 1 meters, or 6.68458712267E-12 astronomical unit.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between metres and astronomical units.
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›› Definition: Meter

The metre, symbol: m, is the basic unit of distance (or of "length", in the parlance of the physical sciences) in the International System of Units. The internationally-accepted spelling of the unit in English is "metre", although the American English spelling meter is a common variant. However, both American and non-American forms of English agree that the spelling "meter" should be used as a suffix in the names of measuring devices such as chronometers and micrometers.


›› Definition: Astronomical unit

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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