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
620.270122 mph ==
Mach 2 = 1,322.94 knots
5100.087 MPH 8207.795 KMPH 4431.885 Knots
Mach 0.89 or 950km/h or 512 knots
Mach 3, sounds good.728 knots
Knots or Mach for very fast ones
The maximum speed of the A380 is Mach 0.96 (634 mpg, 551 knots). max cruising speed = .85 MACH max design speed = .96 MACH
At cruise altitude (35,000ft) the average cruise speed is 460 knots - 530mph.
Subsonic means any speed below the speed of sound. (Mach 1). So subsonic aircraft range from 0 - 661 knots at sea level. (Mach 1 is 661 knots at sea level.)
21 knots = 24.2 mph
Mach 0.80 (530 mph or 458 knots) at 35,000 ft.
Typical cruise speed is 470 knots (860KPH) or Mach 0.82
Maximum speed: Mach 1.8 , (1,191 knots, 2,205 km/h)