Convert Knots to Mach 1
Convert Knots (kn) to Mach 1 (Ma) instantly and accurately.
Conversion Formula
Ma = kn × 0.001511782434
About Knots
A knot (kn) = 1 nautical mile per hour = 1,852/3,600 m/s ≈ 0.51444 m/s - the universal speed unit for aviation and maritime navigation (ICAO and IMO standard). GA aircraft cruise 100-140 kn; commercial airliners 450-480 kn; Concorde 1,176 kn (Mach 2). Container ships 18-22 kn; QM2 exceeds 30 kn. Beaufort Force 12 hurricane begins at 64 kn. Gulf Stream surface current 2-4 kn. 1 kn = 1.852 km/h = 1.15078 mph.
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
Quick Reference Table
| Knots (kn) | Mach 1 (Ma) |
|---|---|
| 1 kn | 0.00151178 Ma |
| 2 kn | 0.00302356 Ma |
| 5 kn | 0.00755891 Ma |
| 10 kn | 0.0151178 Ma |
| 25 kn | 0.0377946 Ma |
| 50 kn | 0.0755891 Ma |
| 100 kn | 0.151178 Ma |