Distance and trip time
Nautical miles to miles
One nautical mile is 1.15078 statute miles. Add a speed in knots to turn that distance into hours on the water.
- Nautical miles
- 10
- Statute miles
- 11.51
- Kilometers
- 18.52
- Trip time at 15 kt
- 0h 40m
Use the time as a trip length
Charts and harbor-to-harbor distances are in nautical miles. Dividing that distance by speed in knots gives hours underway, before current and a no-wake channel. Take that window to the harbor page and read the hour-by-hour Go, Caution, and No-Go call.
Nautical mile questions
How many miles are in a nautical mile?
One international nautical mile is 1.150779 statute miles, or exactly 1.852 kilometers.
How is trip time calculated?
Time in hours is distance in nautical miles divided by speed in knots. Statute miles are converted to nautical miles first, using the same factor as knots to mph.
Does this include current, tides, or fuel?
The result is distance divided by speed through the water. Current, a lumpy sea, and no-wake zones change the clock time. Use it as the trip length, then check the harbor's Go, Caution, or No-Go call for those hours.