How to convert Light-year to Millimeter

Conversion factor and calculation steps from Light-year (ly) to Millimeter (mm).

Conversion logic

Each unit is defined via the base unit (meter (m)). The value is first converted to the base unit, then to the selected unit.

1 ly = 9.46073047e15 m

1 mm = 0.001 m

1 ly × 9.46073047e15 = 9.46073047e15 m

9.46073047e15 m ÷ 0.001 = 9.46073047e18 mm