Convert Miles per Second to Knots
Convert Miles per Second (mi/s) to Knots (kn) instantly and accurately.
Conversion Formula
kn = mi/s × 3128.314471
About Miles per Second
A mile per second (mi/s) = exactly 1,609.344 m/s - above the fastest air-breathing aircraft. NASA X-43A scramjet: 2.9 km/s ≈ 1.8 mi/s (Mach 9.6). Earth's orbital speed around the Sun: ~18.5 mi/s (29.8 km/s). Light travels ~186,282 mi/s in vacuum - the classic imperial figure still used in popular astronomy. Tunguska impactor entered Earth's atmosphere at ~9-11 mi/s. 1 mi/s = 3,600 mph = 3,128.3 kn.
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.
Quick Reference Table
| Miles per Second (mi/s) | Knots (kn) |
|---|---|
| 1 mi/s | 3128.31 kn |
| 2 mi/s | 6256.63 kn |
| 5 mi/s | 15641.6 kn |
| 10 mi/s | 31283.1 kn |
| 25 mi/s | 78207.9 kn |
| 50 mi/s | 156416 kn |
| 100 mi/s | 312831 kn |