Convert Miles per Hour to Earth Escape Velocity
Convert Miles per Hour (mph) to Earth Escape Velocity (v_esc) instantly and accurately.
Conversion Formula
v_esc = mph × 3.996424102e-5
About Miles per Hour
A mile per hour (mph) = exactly 0.44704 m/s - the primary road speed unit in the US, UK, and a few other countries. US interstate limits 65-85 mph; UK motorway 70 mph. Walking ~3-4 mph; club cycling 20-25 mph. MLB elite fastball 100 mph (44.7 m/s). Saffir-Simpson Category 5 hurricane ≥157 mph. Boeing 737 MAX cruises at ~521 mph (Mach 0.79). 1 mph = 0.44704 m/s = 1.60934 km/h = 0.86898 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 Hour (mph) | Earth Escape Velocity (v_esc) |
|---|---|
| 1 mph | 3.996 × 10-5 v_esc |
| 2 mph | 7.993 × 10-5 v_esc |
| 5 mph | 0.000199821 v_esc |
| 10 mph | 0.000399642 v_esc |
| 25 mph | 0.000999106 v_esc |
| 50 mph | 0.00199821 v_esc |
| 100 mph | 0.00399642 v_esc |