## Convert astronomical unit to light second

 astronomical unit light-second

How many astronomical unit in 1 light-second? The answer is 0.0020039888042206.
We assume you are converting between astronomical unit and light second.
You can view more details on each measurement unit:
astronomical unit or light-second
The SI base unit for length is the metre.
1 metre is equal to 6.6845871226706E-12 astronomical unit, or 3.3356409519815E-9 light-second.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between astronomical units and light seconds.
Type in your own numbers in the form to convert the units!

## Quick conversion chart of astronomical unit to light-second

1 astronomical unit to light-second = 499.00478 light-second

2 astronomical unit to light-second = 998.00957 light-second

3 astronomical unit to light-second = 1497.01435 light-second

4 astronomical unit to light-second = 1996.01914 light-second

5 astronomical unit to light-second = 2495.02392 light-second

6 astronomical unit to light-second = 2994.0287 light-second

7 astronomical unit to light-second = 3493.03349 light-second

8 astronomical unit to light-second = 3992.03827 light-second

9 astronomical unit to light-second = 4491.04305 light-second

10 astronomical unit to light-second = 4990.04784 light-second

## Want other units?

You can do the reverse unit conversion from light-second to astronomical unit, or enter any two units below:

## Enter two units to convert

 From: To:

## 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".

## Definition: Light-second

A light-second is a unit of length. It is defined as the distance light travels in an absolute vacuum in one second or 299,792,458 meters. Note that this value is considered exact, since the meter is actually (as of 1983) defined in terms of the light second. It is just over 186,282 miles and almost 109 feet.

## Metric conversions and more

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!