At One Place

Millimeters to light-years

1 millimeter in light-years
1 mm = 1.057 × 10^-19 ly
ly = mm × 1.057000834 × 10^-19

To convert millimeters to light-years, multiply by 1.057000834 × 10^-19. The table below gives the values people look up most often, and the converter works for any number.

Millimeters to light-years table

Common millimeter values converted to light-years.
Millimeters Light-years
1 mm 1.057 × 10^-19
2 mm 2.114 × 10^-19
3 mm 3.171 × 10^-19
4 mm 4.228 × 10^-19
5 mm 5.285 × 10^-19
10 mm 1.057 × 10^-18
15 mm 1.586 × 10^-18
20 mm 2.114 × 10^-18
25 mm 2.643 × 10^-18
30 mm 3.171 × 10^-18
40 mm 4.228 × 10^-18
50 mm 5.285 × 10^-18
75 mm 7.928 × 10^-18
100 mm 1.057 × 10^-17
250 mm 2.643 × 10^-17
500 mm 5.285 × 10^-17
1,000 mm 1.057 × 10^-16

How the conversion works

The relationship is ly = mm × 1.057000834 × 10^-19. Both units measure length, so the conversion is a fixed factor that never changes.

Common questions

How many light-years are in one millimeter?
One millimeter equals 1.057 × 10^-19 light-years. ly = mm × 1.057000834 × 10^-19.
How do you convert millimeters to light-years?
Use ly = mm × 1.057000834 × 10^-19. So 10 mm is 1.057 × 10^-18 ly.
How many millimeters are in one light-year?
One light-year equals 9.4607305 × 10^18 millimeters, which is the reverse of the conversion above.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked