Convert Astronomical unit to Zettameter (au to Zettameter)

Astronomical unit (au) and Zettameter (Zettameter) are both units of length. With the conversion form below, you can effortlessly and accurately convert astronomical unit to zettameter. This free online calculator tool makes it simple and easy to perform the conversion from au unit to the Zettameter unit.

Length is the measure of distance in one dimension—the extent of an object from one end to the other, or the distance between two points. The SI base unit is themeter (m), defined since 1983 as the distance light travels in a vacuum in 1/299,792,458 of a second. Common derived units include the kilometer (1 km = 1,000 m) for distances and the centimeter (cm) and millimeter (mm) for everyday measurements. US customary length units include the inch (in), foot (ft), yard (yd), and mile (mi). The nautical mile (1,852 m) is used in aviation and maritime navigation.

The astronomical unit (symbol: AU, au, or ua) is a unit of length defined as exactly 149,597,870,700 meters. It is based on the average distance between the Earth and the Sun and is widely used to express distances within the Solar System. Learn more about the meter and length.

One astronomical unit is equal to 149,597,870,700 meters, 149,597,870.7 kilometers, 92,955,807.27 miles, and 0.0000158125 light-years. It is commonly used in astronomy, astrophysics, planetary science, and space exploration to describe distances between planets, asteroids, and the Sun.

Zettameter (symbol: Zm) is a metric unit of length equal to one sextillion (10²¹) meters. One zettameter is exactly equal to 1 quintillion kilometers, 1 trillion gigameters, or 0.001 yottameter. The zettameter is used to express extraordinarily large distances in cosmology, astrophysics, and theoretical astronomy, where conventional units such as kilometers or astronomical units become impractical. It provides a standardized SI unit for representing distances on an intergalactic or cosmic scale.