Convert nautical miles to astronomical units
1 nmi = 0.0000000123798553504 au — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
How to convert nautical miles to astronomical units
Multiply the number of nautical miles by 0.0000000123798553504 to get astronomical units.
Nautical mile: Exactly 1852 m by international agreement — roughly one minute of latitude.
Astronomical unit: Fixed at exactly 149 597 870 700 m by the IAU in 2012.
Nautical mile to Astronomical unit conversion table
| Nautical miles (nmi) | Astronomical units (au) |
|---|---|
| 1 nmi | 1.2379855e-8 |
| 2 nmi | 2.4759711e-8 |
| 3 nmi | 3.7139566e-8 |
| 5 nmi | 6.1899277e-8 |
| 10 nmi | 0.000 000 123 798 55 |
| 20 nmi | 0.000 000 247 597 11 |
| 25 nmi | 0.000 000 309 496 38 |
| 50 nmi | 0.000 000 618 992 77 |
| 100 nmi | 0.000 001 237 985 5 |
| 250 nmi | 0.000 003 094 963 8 |
| 500 nmi | 0.000 006 189 927 7 |
| 1000 nmi | 0.000 012 379 855 |
Astronomical unit to Nautical mile conversion table
| Astronomical units (au) | Nautical miles (nmi) |
|---|---|
| 1 au | 80 776 388 |
| 2 au | 161 552 780 |
| 3 au | 242 329 160 |
| 5 au | 403 881 940 |
| 10 au | 807 763 880 |
| 20 au | 1 615 527 800 |
| 25 au | 2 019 409 700 |
| 50 au | 4 038 819 400 |
| 100 au | 8 077 638 800 |
| 250 au | 20 194 097 000 |
| 500 au | 40 388 194 000 |
| 1000 au | 80 776 388 000 |
Frequently asked
How many astronomical units are in a nautical mile?
One nautical mile equals 1.237985535e-8 astronomical units (nmi → au). That figure is exact, not rounded.
How do you convert nautical miles to astronomical units?
Multiply the number of nautical miles by 0.0000000123798553504 to get astronomical units.
What is 1 au in nautical miles?
One astronomical unit is 80776388.07 nautical miles.
What is 10 nmi in au?
10 nmi = 0.000 000 123 798 55 au.
What exactly is a nautical mile?
Exactly 1852 m by international agreement — roughly one minute of latitude.
What exactly is a astronomical unit?
Fixed at exactly 149 597 870 700 m by the IAU in 2012.