/convert/light-years-to-kilometers/ Convert light-years to kilometers instantly. Enter any value and get the result. Includes a conversion table and the exact formula. article Light-Years to Kilometers Converter — 247QuickTools ,{ "@context": "https://schema.org", "@type": "SpeakableSpecification", "cssSelector": [".tool-intro", ".info-gain-section"] }
📏 Length

Light-Years to Kilometers Converter

Convert light-years to kilometers instantly. Enter any value and get the result. Includes a conversion table and the exact formula.

Quick answer: To convert light-years to kilometers, multiply by 9461000000000.0. For example, 1 light-years = 9461000000000.0 kilometers. Use the calculator below for any value.
light-years to kilometers
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Common conversions
Light-Years Kilometers
Formula:

How to convert light-years to kilometers

1

Enter your value

Type the number of light-years you want to convert into the left box. The result in kilometers appears instantly in the right box. You can also type into the right box to convert in the other direction.

2

Use the swap button

Click the ⇄ Swap button to reverse the conversion — Kilometers to Light-Years. Your current value carries across so you don't have to re-enter anything.

3

About Light-Years and Kilometers

light-years and kilometers are both units of length. Use this converter to switch between them instantly.

💡 Did you know?

1 light-year = 9.461 × 10¹² km = 9.461 trillion km. The nearest star, Proxima Centauri, is 4.24 light-years = 40.1 trillion km away. Travelling at 100 kph, it would take 45.7 billion years to reach it — over 3× the age of the universe.

📊 Common conversions at a glance
Light-Years Kilometers
0.0001 9.461e+08
0.001 9.461e+09
0.01 9.461e+10
0.1 9.461e+11
1 9.461e+12
4.24 4.011e+13
Reviewed for 2026. Light-Years ↔ Kilometers conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.