Verify before flight. Check the POH/AFM for aircraft-specific limits and performance.
Conversions
Speed Conversion Calculator
Convert aviation speed between knots, miles per hour, kilometers per hour, and meters per second.
kt
MPH—
km/h—
m/s—
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100 knots in mph, km/h and m/s
100 kt converts to 115.08 mph, 185.2 km/h and 51.44 m/s. A knot is one nautical mile per hour.
Changing the unit does not change the speed reference: IAS, TAS and groundspeed remain different quantities even when all are expressed in knots.
Formula and method
One knot equals one nautical mile per hour, approximately 1.15078 mph, 1.852 km/h or 0.51444 m/s.