βοΈ Aeronautical & Maritime Navigation
Nautical & Aviation Speed Converter
Convert navigation velocity across $\text{Knots}$ ($\text{kt} = \text{NM/h}$), $\text{Mach Number}$ ($\text{ISA}$ sea level), $\text{km/h}$, $\text{mph}$, and $\text{m/s}$.
π’ Container Ship (22 kt)
π©οΈ Cessna 172 Cruise (120 kt)
βοΈ Boeing 787 Cruise (Mach 0.85)
π Concorde Supersonic (Mach 2.04)
π Category 1 Hurricane (64 kt)
Input Speed Value
Standard Nautical Knots (kt)
490.0 kt
km/h
907.5 km/h
Statute mph
563.9 mph
Mach Number
Mach 0.741
π‘ Nautical Mile & Knot Definition:
Understanding Nautical & Aviation Speed Standards
International aviation and maritime navigation universally adopt Knots and Nautical Miles because of their direct geometric connection to the Earth's coordinates:
- Nautical Mile (NM): Historically defined as exactly $1\text{ minute of latitude}$ along any meridian of Earth ($\approx 1/60\text{th of a degree}$). Standardized internationally as exactly $1,852\text{ meters}$.
- Mach Number ($M$): The ratio of true airspeed to the local speed of sound ($M = v / a$). At standard sea-level temperature ($15^\circ\text{C}$), the speed of sound is $a_0 \approx 340.294\text{ m/s} = 661.47\text{ kt} = 1225.06\text{ km/h}$.