Light Year Calculator

Physics

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Converts distances between light-years and other units, such as kilometers, miles, astronomical units, and parsecs.

More tools:Science & Lab Calculators

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Distance in Light-Years in the units shown.

Step 2

Read Distance in Parsecs, Distance in Astronomical Units (AU), Distance in Miles, and Distance in Kilometers in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

One Light-Year

Distance in Light-Years: 1

Distance in Parsecs: 0.3065951687 pc; Distance in Astronomical Units (AU): 63,241 AU; Distance in Miles: 5,878,600,000,000 miles; Distance in Kilometers: 9,460,700,000,000 km

Ten Light-Years

Distance in Light-Years: 10

Distance in Parsecs: 3.065951687 pc; Distance in Astronomical Units (AU): 632,410 AU; Distance in Miles: 58,786,000,000,000 miles; Distance in Kilometers: 94,607,000,000,000 km

One Hundred Light-Years

Distance in Light-Years: 100

Distance in Parsecs: 30.65951687 pc; Distance in Astronomical Units (AU): 6,324,100 AU; Distance in Miles: 587,860,000,000,000 miles; Distance in Kilometers: 946,070,000,000,000 km

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