How to use this calculator
Fill in any two values and leave the third field empty. The calculator will automatically solve for the missing value.
Formula used
Distance = Speed × Time
Speed = Distance ÷ Time
Time = Distance ÷ Speed
Speed = Distance ÷ Time
Time = Distance ÷ Speed
Example
- Speed = 12 knots
- Time = 5 hours
- Distance = 60 nautical miles
Who is this for?
This tool is useful for deck officers, cadets, and marine engineers who need quick speed-time-distance calculations during passage planning or watchkeeping.