Did you mean to convert |
micrometre micron |
to |
astronomical unit |

How many micrometer in 1 astronomical unit?
The answer is 1.49597870691E+17.

We assume you are converting between **micrometre** and **astronomical unit**.

You can view more details on each measurement unit:

micrometer or
astronomical unit

The SI base unit for **length** is the metre.

1 metre is equal to 1000000 micrometer, 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 micrometres 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 micrometer, or enter any two units below:

micrometer to light-second

micrometer to gigameter

micrometer to sagene

micrometer to kiloyard

micrometer to meile

micrometer to marathon

micrometer to tenthmeter

micrometer to angstrom

micrometer to stick

micrometer to verge

A micrometre (American spelling: micrometer, symbol µm) is an SI unit of length equal to one millionth of a metre, or about a tenth of the size of a droplet of mist or fog. It is also commonly known as a micron, although that term is officially outdated. It can be written in the expanded mathmatical notation (1×10^{-6} m)

The symbol µ is the "micro sign", which should look identical to the Greek letter mu (?) (the two may or may not look the same, depending on the font). The symbol "um" is sometimes used, when the µ and ? are not available, for example when using a typewriter.

The micrometre is a common unit of measurement for wavelengths of infrared radiation. Some people (especially in astronomy and the semiconductor business) use the old name micron and/or the solitary symbol µ (both of which were official between 1879 and 1967) to denote a micrometre. This practice persists in the face of official discouragement, perhaps to help disambiguate between the unit of measurement and the micrometer, a measuring device.

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!