Units & Conversions
Space Distance Converter - Convert astronomical distances
Convert astronomical distances
Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.
Frequently asked questions
What is an AU?
Astronomical Unit - the average Earth-Sun distance: 149.6 million km.
How far is a light year?
The distance light travels in one year: 9.46 trillion km or 5.88 trillion miles.
Why use parsecs?
Parsecs relate directly to stellar parallax measurements. 1 pc = distance where 1 AU subtends 1 arcsecond.
Related tools
About this tool
Inputs
- Distance Value
- Unit
- Kilometers (km)
- Miles
- Astronomical Units (AU)
- Light-seconds
- Light-minutes
- Light-years
- Parsecs
Results
- Kilometers
- Miles
- Astronomical Units
- Light Years
- Parsecs
- Comparison
- Below Earth–Moon distance
- Below Earth–Sun distance
- Solar system scale
- Nearby stars scale
- Interstellar distance
- N/A
Use this Space Distance Converter to convert a value quickly and consistently. Provide Distance Value, Light-years, and Unit and it returns Light Years and Kilometers.
If you are comparing results across tools, keep the same units and the same level of precision. The displayed value may be rounded, so copy more decimal places when you need a tighter match.