Convert light-years to nautical miles
1 ly = 5108385784330 nmi — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
How to convert light-years to nautical miles
Multiply the number of light-years by 5108385784330 to get nautical miles.
Light-year: Light travelling for one Julian year (365.25 days) in vacuum — exact, since both inputs are defined values.
Nautical mile: Exactly 1852 m by international agreement — roughly one minute of latitude.
Light-year to Nautical mile conversion table
| Light-years (ly) | Nautical miles (nmi) |
|---|---|
| 1 ly | 5 108 385 800 000 |
| 2 ly | 10 216 772 000 000 |
| 3 ly | 15 325 157 000 000 |
| 5 ly | 25 541 929 000 000 |
| 10 ly | 51 083 858 000 000 |
| 20 ly | 102 167 720 000 000 |
| 25 ly | 127 709 640 000 000 |
| 50 ly | 255 419 290 000 000 |
| 100 ly | 510 838 580 000 000 |
| 250 ly | 1 277 096 400 000 000 |
| 500 ly | 2 554 192 900 000 000 |
| 1000 ly | 5 108 385 800 000 000 |
Nautical mile to Light-year conversion table
| Nautical miles (nmi) | Light-years (ly) |
|---|---|
| 1 nmi | 1.9575655e-13 |
| 2 nmi | 3.9151311e-13 |
| 3 nmi | 5.8726966e-13 |
| 5 nmi | 9.7878277e-13 |
| 10 nmi | 1.9575655e-12 |
| 20 nmi | 3.9151311e-12 |
| 25 nmi | 4.8939139e-12 |
| 50 nmi | 9.7878277e-12 |
| 100 nmi | 1.9575655e-11 |
| 250 nmi | 4.8939139e-11 |
| 500 nmi | 9.7878277e-11 |
| 1000 nmi | 1.9575655e-10 |
Frequently asked
How many nautical miles are in a light-year?
One light-year equals 5108385784000 nautical miles (ly → nmi). That figure is exact, not rounded.
How do you convert light-years to nautical miles?
Multiply the number of light-years by 5108385784330 to get nautical miles.
What is 1 nmi in light-years?
One nautical mile is 1.957565545e-13 light-years.
What is 10 ly in nmi?
10 ly = 51 083 858 000 000 nmi.
What exactly is a light-year?
Light travelling for one Julian year (365.25 days) in vacuum — exact, since both inputs are defined values.
What exactly is a nautical mile?
Exactly 1852 m by international agreement — roughly one minute of latitude.