Or, as expressed in feet:

One mile (sm) - 5,280 feet
One kilometer (km) - 3,274 feet
One nautical mile (nm) - 6,000 feet

1 knot = 1.14 miles


If future generations are to remember us with gratitude rather than contempt, we must leave them more than the miracle of technology. We must leave them a glimpse of the world as it was in the beginning, not just after we got through with it.
- Lyndon Johnson, on signing the Wilderness Act into law (1964)