Au converter to kilometers

It is approximately equal to 0. The astronomical unit AU or au or a. It is approximately equal to the mean distance between the Earth and Sun. 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.

You can find metric conversion tables for SI units, as well as English units, currency, and other data. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between astronomical units and kilometres. Type in your own numbers in the form to convert the units!

You can do the reverse unit conversion from kilometers to AU , or enter any two units below:. The astronomical unit AU or au or a. Until American and British units of length were different in 2 parts per million. In the middle of 20th century it started causing problems and the governments of the two countries agreed to refine the measures to exactly match. Since then Great Britain and the United States were using the same measures of length.

In the U. From the UK adopted metric units for general use.