Convert Feet per Second to Earth Escape Velocity
Convert Feet per Second (ft/s) to Earth Escape Velocity (v_esc) instantly and accurately.
Conversion Formula
v_esc = ft/s × 2.724834615e-5
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.
About Earth Escape Velocity
Earth's escape velocity = 11,186 m/s at the surface - v_esc = √(2GM/r). A spacecraft launched at this speed (any direction) escapes on a parabolic trajectory; less gives an elliptical orbit. Apollo's trans-lunar injection exceeded this to reach the Moon. Voyager, Pioneer, and New Horizons all exceeded 11.2 km/s at launch. Moon escape velocity 2.38 km/s; Mars 5.03 km/s; Jupiter 59.5 km/s. 1 Earth v_esc ≈ 11,186 m/s = 40,270 km/h.
Quick Reference Table
| Feet per Second (ft/s) | Earth Escape Velocity (v_esc) |
|---|---|
| 1 ft/s | 2.725 × 10-5 v_esc |
| 2 ft/s | 5.45 × 10-5 v_esc |
| 5 ft/s | 0.000136242 v_esc |
| 10 ft/s | 0.000272483 v_esc |
| 25 ft/s | 0.000681209 v_esc |
| 50 ft/s | 0.00136242 v_esc |
| 100 ft/s | 0.00272483 v_esc |