Convert Meter to Astronomical unit (m to Astronomical unit)

Meter (m) and Astronomical unit (Astronomical unit) are both units of length. With the conversion form below, you can effortlessly and accurately convert meter to astronomical unit. This free online calculator tool makes it simple and easy to perform the conversion from m unit to the Astronomical unit 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 meter (m) is the fundamental unit of length in the metric system and the International System of Units (SI). Defined since 1983 based on the speed of light in a vacuum, the meter is the standard for measuring distance, height, width, and length across virtually every discipline worldwide. One meter equals 100 centimeters or approximately 39.37 inches. The meter appears in construction specifications, scientific research, engineering blueprints, sports measurements, and everyday applications in nearly every country. It serves as the foundation for all other metric length units—from micrometers to kilometers—making it the universal reference point for the global measurement system.

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.