Convert Astronomical Units to Light Years

Use our accurate converter to change astronomical units into light years. This tool is simple to use and works instantly.

How to Calculate

To change astronomical units to light years, you just need to know the conversion factor.

Rule: 1 Astronomical Units = 0.0000158125 Light Years

Astronomical Units to Light Years

Pre-defined calculator for direct astronomical units to light years conversion.

From

Astronomical Units (AU)

To (Result)

Light Years (ly)

Formula: 1 Astronomical = 0.00001581 Light

Definition: An astronomical unit is roughly the distance from the Earth to the Sun.

History: A fixed value was decided on recently to help scientists talk about space.

Where it is used: Used by astronomers to measure distances inside our solar system.

Calculation: To convert astronomical units to light years, multiply the value by the conversion factor (0.0000158125).

Example: convert 15 au to ly:
15 au = 15 × 0.0000158125 ly = 0.0002371876 ly

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