Convert Miles per Second to Earth Escape Velocity
Convert Miles per Second (mi/s) to Earth Escape Velocity (v_esc) instantly and accurately.
Conversion Formula
v_esc = mi/s × 0.1438712677
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 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
| Miles per Second (mi/s) | Earth Escape Velocity (v_esc) |
|---|---|
| 1 mi/s | 0.143871 v_esc |
| 2 mi/s | 0.287743 v_esc |
| 5 mi/s | 0.719356 v_esc |
| 10 mi/s | 1.43871 v_esc |
| 25 mi/s | 3.59678 v_esc |
| 50 mi/s | 7.19356 v_esc |
| 100 mi/s | 14.3871 v_esc |