🔭 Space Distance Converter
Light-years, AU, parsecs and kilometers — and see right away which real cosmic distance it resembles.
Find an object in the Universe
A star, constellation, galaxy, nebula or planet. If it is not in our list, AI will find it.
Cosmic cheat sheet
1 AU149.6 million km — Earth to Sun
1 light-year≈ 9.46 trillion km
1 parsec≈ 3.26 light-years
1 Mpc1,000,000 parsecs
FAQ
How many kilometers are in a light-year?
About 9.46 trillion km (9,460,730,472,580.8 km) — the distance light travels in one Julian year.
What is an astronomical unit (AU)?
The mean Earth–Sun distance: exactly 149,597,870.7 km. Handy for distances inside the Solar System.
What is a parsec?
The distance at which the radius of Earth's orbit spans one arcsecond. 1 parsec ≈ 3.26 light-years ≈ 30.9 trillion km.
How far away is Polaris?
Roughly 430–450 light-years. The light you see tonight left it in the 16th century.
Where are the calculations done?
Right in your browser. Nothing is sent anywhere.