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Free Length Converter

Light-year to millimeter.

One light-year equals 9.46073e+18 millimeter. Use this converter for quick, accurate ly to mm conversions.

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Conversion formula.

1 ly = 9.46073e+18 mm

To convert light-year to millimeter, multiply the value in ly by 9.46073e+18.

Quick examples

  • 1 ly = 9.46073e+18 mm
  • 5 ly = 4.730365e+19 mm
  • 10 ly = 9.46073e+19 mm
  • 100 ly = 9.46073e+20 mm

Light-year to Millimeter conversion table.

Light-year (ly)Millimeter (mm)
19.46073e+18
21.892146e+19
32.838219e+19
43.784292e+19
54.730365e+19
65.676438e+19
76.622511e+19
87.568584e+19
98.514657e+19
109.46073e+19
111.04068e+20
121.135288e+20
131.229895e+20
141.324502e+20
151.41911e+20
161.513717e+20
171.608324e+20
181.702931e+20
191.797539e+20
201.892146e+20
Convert the other way: Millimeter to Light-year

Related conversions.

Millimeter to CentimeterMillimeter to DecimeterMillimeter to MeterMillimeter to KilometerMillimeter to MicrometerMillimeter to Nanometer

More Light-year conversions.

ly → cmly → dmly → mly → kmly → μmly → nmly → inly → ft

Frequently asked questions.

How many millimeter are in a light-year?
One light-year equals 9.46073e+18 millimeter (mm).
How do I convert ly to mm?
Multiply the value in ly by 9.46073e+18. For example, 10 ly = 9.46073e+19 mm.
Is this conversion exact?
Yes. This converter uses the internationally defined factor: 1 ly = 9.46073e+18 mm.