What is 1 astronomical unit in m?

1 astronomical unit (AU) is equal to 149,597,870.7 meters (or approximately 150 million km). It is defined as the average distance between the Earth and the Sun, and is commonly used as a reference distance for measuring distances within the solar system. For example, Venus is approximately 0.72 AU from the Sun, while Mars is approximately 1.52 AU from the Sun.