Convert Orbital Speed (ISS) to Feet per Second
Convert Orbital Speed (ISS) (v_orb) to Feet per Second (ft/s) instantly and accurately.
Conversion Formula
ft/s = v_orb × 25131.2336
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 Feet per Second
A foot per second (ft/s) = exactly 0.3048 m/s - the primary speed unit in US ballistics, hydraulics, and gas dynamics. .308 Winchester muzzle velocity ~2,750 ft/s; 9mm pistol 1,200-1,400 ft/s; .50 BMG 2,910 ft/s. Speed of sound at sea level 1,116 ft/s. River channel mean velocities 0.5-6 ft/s; NFPA sprinkler pipe flows also in ft/s. 1 ft/s = 0.3048 m/s = 1.09728 km/h = 60 ft/min.
Quick Reference Table
| Orbital Speed (ISS) (v_orb) | Feet per Second (ft/s) |
|---|---|
| 1 v_orb | 25131.2 ft/s |
| 2 v_orb | 50262.5 ft/s |
| 5 v_orb | 125656 ft/s |
| 10 v_orb | 251312 ft/s |
| 25 v_orb | 628281 ft/s |
| 50 v_orb | 1256560 ft/s |
| 100 v_orb | 2513120 ft/s |