| Nautical Measurements | | |
| Nautical Mile | 1.1508 miles or 1.852 kilometers | Based on the circumference of the earth, used in maritime contexts. |
| Knot | 1.1508 mph or 1.852 kph | Speed equal to one nautical mile per hour. |
| Fathom | 6 feet or 1.8288 meters | Unit of depth in the Imperial system |
| League | Approx. 3.452 miles or 5.556 km | Used to define the distance a person or a horse could walk in an hour. |
| Cable | 0.1 nautical mile or 185.2 meters | Particularly in naval usage to define the distance between ships at sea. |
| Astronomical Measurements | | |
| Astronomical Unit (AU) | Approx. 93 million miles or 150 million kilometers | The average distance from Earth to the Sun. |
| Light Year | 5.879 trillion miles or 9.461 trillion kilometers | The distance that light travels in a vacuum in one year. |
| Parsec | 3.26 light years or 19.2 trillion miles | The distance at which one astronomical unit subtends an angle of one arcsecond. |
| Light Minute | 11.18 million miles or 18 million kilometers | The distance that light travels in a vacuum in one minute. |
| Light Second | 186,282 miles or 299,792 kilometers | The distance that light travels in a vacuum in one second. |
