Light-year to Millimeter (ly → mm)
Convert light-year to millimeter instantly. The conversion factor below is exact by international definition.
Realtime·length·astronomical
Exact
ly
× 9,460,730,472,580,800,000
mm
9,460,730,472,580,800,000
Precision [auto]
6
📐ly to mm formulaExact
mm = ly × 9.460730e+18
Inverse: ly = mm × 1.057001e-19
Worked example: 1 ly = 9.460730e+18 mm
ℹ️About these units
Light-year (ly)
Source: IAU: 1 ly = 365.25 d × c (exact).
Millimeter (mm)
📊Reference table: ly → mm
| Light-year (ly) | Millimeter (mm) |
|---|---|
| 1 | 9,460,730,472,580,800,000 |
| 2 | 18,921,460,945,161,600,000 |
| 5 | 47,303,652,362,904,000,000 |
| 10 | 94,607,304,725,808,000,000 |
| 15 | 141,910,957,088,712,000,000 |
| 20 | 189,214,609,451,616,000,000 |
| 25 | 236,518,261,814,520,000,000 |
| 50 | 473,036,523,629,040,000,000 |
| 100 | 946,073,047,258,080,000,000 |
| 250 | 2,365,182,618,145,200,300,000 |
| 500 | 4,730,365,236,290,401,000,000 |
| 750 | 7,095,547,854,435,600,000,000 |
| 1,000 | 9,460,730,472,580,801,000,000 |
Want a downloadable CSV? Append ?format=csv to the API /api/v1/table endpoint.
🔁Reverse & related
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