Go the distance with easy unit conversions. Whether you're measuring in miles or meters, kilometers or yards, our tool helps you cross the finish line without breaking stride.
A light year (ly) is a unit of length used in astronomy, representing the distance that light travels in one year through a vacuum, approximately 9.461 trillion kilometers (about 5.879 trillion miles).
An astronomical unit (AU) is a unit of length used in astronomy, representing the average distance between the Earth and the Sun, approximately 149.6 million kilometers (about 93 million miles).