Convert Orbital Speed (ISS) to Knots
Convert Orbital Speed (ISS) (v_orb) to Knots (kn) instantly and accurately.
Conversion Formula
kn = v_orb × 14889.84881
About Orbital Speed (ISS)
The ISS orbits at ~408 km altitude at ≈7,660 m/s (27,576 km/h) - the practical LEO benchmark. At this speed it completes one orbit in 92.68 min (15.5 orbits per day), giving astronauts 16 sunrises and sunsets every 24 hours. Delta-v to reach LEO from Earth's surface is ~9,400 m/s (with gravity and drag losses). GEO at 35,786 km requires only ~3,075 m/s per Kepler's third law. 1 ISS speed ≈ 7,660 m/s.
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
| Orbital Speed (ISS) (v_orb) | Knots (kn) |
|---|---|
| 1 v_orb | 14889.8 kn |
| 2 v_orb | 29779.7 kn |
| 5 v_orb | 74449.2 kn |
| 10 v_orb | 148898 kn |
| 25 v_orb | 372246 kn |
| 50 v_orb | 744492 kn |
| 100 v_orb | 1488980 kn |