Navigation
Speed, distance, time and ETA
Speed in knots, distance in nautical miles, steaming time: enter two, get the third. Add the departure time and zones for the ETA in local time.
Fill in any two of the three; the third is worked out.
Hours; 1.5 = 1 h 30 min
Fill in the fields to see the result.
How it works
Distance = speed × time. One knot is one nautical mile (1,852 m) per hour. 300 nm at 12.5 kn takes 24 hours.
For the ETA, the departure is turned into UTC with the departure zone (local − zone = UTC), the steaming time added, and the arrival zone applied (UTC + zone = local). Zones east of Greenwich are positive.
For training and cross-checking. Not a substitute for approved navigation equipment, nautical publications and the ship’s own procedures. Calculations run in your browser and nothing you type is stored; a PDF you download is made on our server and not kept.
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