Mach 3.3 is roughly 2,500–2,600 mph (about 4,000–4,200 km/h) at standard conditions, so a bit over three times the speed of sound.

Quick Scoop

  • Basic idea: Mach is a ratio — Mach 3.3 means you’re going 3.3 times faster than sound in air.
  • In miles per hour: Tables that list Mach 3 at about 2,300 mph put Mach 3.3 in the mid‑2,000 mph range (a bit above Mach 3, below Mach 3.5’s ~2,685 mph).
  • In km/h: Converters that give about 3,700 km/h for Mach 3 imply around 4,000+ km/h for Mach 3.3.
  • In meters per second: Mach 3 is a little over 1,000 m/s , so Mach 3.3 is around 1,100–1,150 m/s.

You can imagine it this way: at Mach 3.3, you’d cross the length of a football field in well under a tenth of a second , far beyond any normal airliner’s speed.

Handy speed table (approximate)

[3][1] [1] [3][1] [4][6][1] [3] [6][1]
Mach number Speed (mph) Speed (km/h)
Mach 3.0 ≈ 2,300 mph≈ 3,700 km/h
Mach 3.3 ≈ 2,500–2,600 mph (estimated from tables)≈ 4,000–4,200 km/h (estimated from converters)
Mach 3.5 ≈ 2,685 mph≈ 4,300–4,400 km/h (by proportion)

Information gathered from public forums or data available on the internet and portrayed here.