Spike's Calculators

Time from a Distance in Nautical Miles and Speed in Knots

Calculate the time it takes to travel a certain distance in nautical miles based on a speed in knots. A knot is a unit of speed equal to one nautical mile per hour. The symbol used for a knot is kn or kt.

Time from Speed and Distance
Knots/Nautical Miles

Distance in Nautical Miles nmi
Speed in Knots kn


Distance in Kilometres km
Distance in Miles mi
Speed in Metres per Second m/sec
Speed in Feet per Second ft/sec
Time in Seconds sec
Time in Minutes min
Time in Decimal Hours hr
Time hour min sec


  1. enter the distance in nautical miles
  2. the speed in knots


  1. the distance in nautical miles converted to kilometres
  2. the distance in nautical miles converted to miles
  3. knots converted to metres per second
  4. knots converted to feet per second
  5. the time in seconds
  6. the time in minutes
  7. the time in decimal hours
  8. the time in an hour, minute, and second format

time = distance ÷ speed
one nautical mile (nmi) = 1.852 kilometres (km)
one nautical mile (nmi) = 1.15077944802354 miles (mi)
one knot = 1 nautical mile (nmi) per hour
one knot (kn) = 0.514444444444444 metres per second (m/sec)
one knot (kn) = 1.68780985710119 feet per second (ft/sec)
Example Calculation
How long will it take to travel 4325 nautical miles at a speed of 45 knots?
Calculate the time in hours by dividing the nautical miles by the knots;
4325 ÷ 45 = 96.1
It will take 96.1 hours to travel the 4325 nautical miles at a speed of 45 knots.
96 hr - 6 min - 40 sec

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