Convert millimeters to light years
1 mm = 1.0570 × 10^-19 ly. Change the amount below, or read the formula and the reference table further down.
1 millimeter equals
light years
1 mm = 1.0570 × 10^-19 ly
The formula
Millimeters and light years both measure length from the same zero, so a single multiplier does the job.
ly = mm × 1.0570 × 10^-19
Going the other way? Convert light years to millimeters.
Millimeters to light years table
Common values, rounded for reading.
| Millimeters (mm) | Light years (ly) |
|---|---|
| 1 | 1.0570 × 10^-19 |
| 2 | 2.1140 × 10^-19 |
| 3 | 3.1710 × 10^-19 |
| 4 | 4.2280 × 10^-19 |
| 5 | 5.2850 × 10^-19 |
| 6 | 6.3420 × 10^-19 |
| 7 | 7.3990 × 10^-19 |
| 8 | 8.4560 × 10^-19 |
| 9 | 9.5130 × 10^-19 |
| 10 | 1.0570 × 10^-18 |
| 15 | 1.5855 × 10^-18 |
| 20 | 2.1140 × 10^-18 |
| 25 | 2.6425 × 10^-18 |
| 30 | 3.1710 × 10^-18 |
| 40 | 4.2280 × 10^-18 |
| 50 | 5.2850 × 10^-18 |
| 75 | 7.9275 × 10^-18 |
| 100 | 1.0570 × 10^-17 |
| 250 | 2.6425 × 10^-17 |
| 500 | 5.2850 × 10^-17 |
| 1,000 | 1.0570 × 10^-16 |
Questions people ask
- How many light years are in a millimeter?
- One millimeter equals 1.0570 × 10^-19 light years.
- How do I convert millimeters to light years by hand?
- Multiply the number of millimeters by 1.0570 × 10^-19. For a rough check, 1.0570 × 10^-19 is close enough for most everyday use.
- What is 1 millimeter in light years?
- 1 millimeter is 1.0570 × 10^-19 light years.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.