How many kilometer in 1 astronomical unit?
The answer is 149597870.691.
We assume you are converting between kilometre and astronomical unit.
You can view more details on each measurement unit:
kilometer or astronomical unit
The SI base unit for length is the metre.
1 metre is equal to 0.001 kilometer, 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 kilometres 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 kilometer, or enter any two units below:
kilometer to inch
kilometer to story
kilometer to hair's breadth
kilometer to smoot
kilometer to elle
kilometer to nanometer
kilometer to stadium
kilometer to township
kilometer to range
kilometer to stride
A kilometre (American spelling: kilometer, symbol: km) is a unit of length equal to 1000 metres (from the Greek words khilia = thousand and metro = count/measure). It is approximately equal to 0.621 miles, 1094 yards or 3281 feet.
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".
ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!