Convert Mach 20 to Mach 1

Convert Mach 20 (Ma20) to Mach 1 (Ma) instantly and accurately.

Mach 20 (Ma20)
Mach 1 (Ma)

Conversion Formula

Ma = Ma20 × 20

About Mach 20

Mach 20 ≈ 6,805.8 m/s (24,501 km/h) at ISA sea level - the peak heating regime of ballistic re-entry. Shock layer temperature exceeds 10,000 K; plasma sheath causes radio blackout. Space Shuttle decelerated through Mach 20 at ~75-80 km altitude; Apollo CM hit the atmosphere at ~Mach 36; ICBM warheads re-enter at Mach 18-24. DARPA HTV-2 reached Mach 20 in 2011. 1 Mach 20 = 6,805.8 m/s.

About Mach 1

Mach 1 = the speed of sound in dry air at ISA sea-level (15°C, 101.325 kPa) = exactly 340.29 m/s (1,225 km/h; 761 mph). Chuck Yeager first exceeded it on 14 October 1947 in the Bell X-1. At 35,000 ft cruise altitude (−56.5°C), it falls to 295.1 m/s. Flight regimes: subsonic Mach 5. Concorde cruised at Mach 2.02; SR-71 at Mach 3.2. 1 Mach 1 = 340.29 m/s.

Quick Reference Table

Mach 20 (Ma20)Mach 1 (Ma)
1 Ma2020 Ma
2 Ma2040 Ma
5 Ma20100 Ma
10 Ma20200 Ma
25 Ma20500 Ma
50 Ma201000 Ma
100 Ma202000 Ma

→ Full Speed Converter