Convert Kilometres per Hour to Earth Escape Velocity
Convert Kilometres per Hour (km/h) to Earth Escape Velocity (v_esc) instantly and accurately.
Conversion Formula
v_esc = km/h × 2.483262809e-5
About Kilometres per Hour
A kilometre per hour (km/h) = 1/3.6 m/s - the universal road speed unit across most of the world. Walking pace ~5-6 km/h; jogging 9-12 km/h; elite marathon runners average 20-21 km/h. High-speed rail (TGV, Shinkansen, ICE) 250-350 km/h; TGV record 574.8 km/h. Category 5 hurricane ≥252 km/h; Thrust SSC land speed record 1,228 km/h (Mach 1.02). 1 km/h = 0.2778 m/s = 0.6214 mph = 0.5400 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
| Kilometres per Hour (km/h) | Earth Escape Velocity (v_esc) |
|---|---|
| 1 km/h | 2.483 × 10-5 v_esc |
| 2 km/h | 4.967 × 10-5 v_esc |
| 5 km/h | 0.000124163 v_esc |
| 10 km/h | 0.000248326 v_esc |
| 25 km/h | 0.000620816 v_esc |
| 50 km/h | 0.00124163 v_esc |
| 100 km/h | 0.00248326 v_esc |