1 knot is equal to 1.15 mph
Mach 1, is about 760 mph at sea level. However, the speed of sound(Mach 1) varies at different altitudes (local speed of sound decreases with increasing altitude). At 36,000 feet the speed of sound is only 660 miles per hour because the temperature is lower.
Mach Speed at sea level is 660 knots and at 36,000 feet Mach Speed is 573 knots.
Mach 1.8 (1,191 knots, 2,205 kph) source Wikipedia
17 knots=19.56 mph
10 knots = 11.51 mph
295 knots = 339.5 mph
You can't convert knots to km - knots is a unit of speed, whereas km is a unit of distance.A knot is exactly 1.852 km/h; so to convert knots to km/hour (NOT to km), you need to multiply by that number.
Mach 2 = 1,322.94 knots
5100.087 MPH 8207.795 KMPH 4431.885 Knots
Knots or Mach for very fast ones
Mach 0.89 or 950km/h or 512 knots
Mach 3, sounds good.728 knots
At cruise altitude (35,000ft) the average cruise speed is 460 knots - 530mph.
Maximum speed: Mach 1.8 , (1,191 knots, 2,205 km/h)
21 knots = 24.2 mph
Mach 1 is 1,225.044 km/h
Mach 1.8 (1,191 knots, 2,205 kph) source Wikipedia
29.92 mph
Mach One was created in 1983.